case study questions electrochemistry

Class 12 Chemistry Case Study Questions PDF Download

Post author: studyrate
Post published:
Post category: Class 12 / 12 board
Post comments: 0 Comments

Looking for Class 12 Chemistry Case Study Based Questions in PDF format? This comprehensive article provides expert insights, engaging content, and answers to frequently asked questions to help you excel in your studies. Download the PDF now and boost your chemistry knowledge!

Join our Telegram Channel, there you will get various e-books for CBSE 2024 Boards exams for Class 9th, 10th, 11th, and 12th.

You need to improve your preparation for the Class 12 Chemistry Case Study Questions exams if you want to achieve a 95+% on the boards. You may find case study questions from every chapter that will be covered in the CBSE Class 12 Chemistry Board Exams in this post.

Table of Contents

Case Study-Based Questions for Class 12 Chemistry

Welcome to the world of Class 12 Chemistry Case Study Questions! As a student pursuing Chemistry in the 12th grade, you have already shown dedication and commitment to the subject. However, dealing with case study-based questions can be both intriguing and challenging. In this article, we will explore the nuances of such questions and offer valuable guidance to excel in your exams.

Class 12 Physics Case Study Questions Class 12 Chemistry Case Study Questions Class 12 Biology Case Study Questions Class 12 Maths Case Study Questions

Importance of Class 12 Chemistry Case Study-Based Questions

Class 12 Chemistry case study-based questions play a vital role in your overall understanding of the subject. They enable you to:

Apply Theoretical Knowledge : Case studies allow you to apply the concepts you have learned in real-life situations, bridging the gap between theory and practical application.
Develop Analytical Skills : By critically analyzing case scenarios, you enhance your analytical abilities, which are essential in various professional fields.
Enhance Problem-Solving Abilities : Tackling case study-based questions hones your problem-solving skills, preparing you to face challenges with confidence.
Gain Deeper Insights : Exploring different case studies exposes you to a wide range of chemical reactions and phenomena, broadening your understanding of Chemistry.

Tips to Excel in Class 12 Chemistry Case Study Questions

Thoroughly Understand the Concepts: Before attempting case study questions, ensure you have a strong grasp of the underlying concepts and theories.
Analyze the Scenario Carefully: Take your time to read and comprehend the given case study. Pay attention to every detail to identify the key points.
Relate to Real-Life Scenarios: Try to connect the case study with real-life situations, as this will make the problem-solving process more intuitive.
Practice Regularly: Practice a wide variety of case study questions to familiarize yourself with different scenarios and improve your problem-solving skills.
Collaborate with Peers: Engage in group discussions and brainstorming sessions with your peers. This will provide diverse perspectives and enhance your critical thinking.

Best Books for Class 12 Chemistry

Strictly in accordance with the new term-by-term curriculum for the Class 12 Chemistry Case Study Questions exams to be held in the academic session 2024, including the new board-introduced multiple-choice question types, Stand-Alone MCQs, and MCQs based on Assertion-Reason Case-based MCQs. Included are inquiries from the official CBSE Question Bank that was released in April 2024. What changes have been made to the book: strictly in accordance with the term-by-term syllabus for the board exams that will be held during the 2024 academic year? Chapter- and topic-specific multiple-choice questions based on the unique assessment plan for the Class 12 Chemistry Case Study Questions Board Examination.

Chemistry Syllabus for 2024

Unit II: Solutions (15 Periods)

Types of solutions, expression of concentration of solutions of solids in liquids, solubility of gases in liquids, solid solutions, Raoult’s law, colligative properties – relative lowering of vapour pressure, elevation of boiling point, depression of freezing point, osmotic pressure, determination of molecular masses using colligative properties, abnormal molecular mass, Van’t Hoff factor.

Unit III: Electrochemistry (18 Periods)

Redox reactions, EMF of a cell, standard electrode potential, Nernst equation and its application to chemical cells, Relation between Gibbs energy change and EMF of a cell, conductance in electrolytic solutions, specific and molar conductivity, variations of conductivity with concentration, Kohlrausch’s Law, electrolysis and law of electrolysis (elementary idea), dry cell-electrolytic cells and Galvanic cells, lead accumulator, fuel cells, corrosion.

Unit IV: Chemical Kinetics (15 Periods)

Rate of a reaction (Average and instantaneous), factors affecting rate of reaction: concentration, temperature, catalyst; order and molecularity of a reaction, rate law and specific rate constant, integrated rate equations and half-life (only for zero and first order reactions), concept of collision theory (elementary idea, no mathematical treatment), activation energy, Arrhenius equation.

Unit VIII: d and f Block Elements (18 Periods)

General introduction, electronic configuration, occurrence and characteristics of transition metals, general trends in properties of the first-row transition metals – metallic character, ionization enthalpy, oxidation states, ionic radii, colour, catalytic property, magnetic properties, interstitial compounds, alloy formation, preparation and properties of K 2 Cr 2 O 7 and KMnO 4 .

Lanthanoids – Electronic configuration, oxidation states, chemical reactivity and lanthanoid contraction and its consequences.

Actinoids – Electronic configuration, oxidation states and comparison with lanthanoids.

Unit IX: Coordination Compounds (18 Periods)

Coordination compounds – Introduction, ligands, coordination number, colour, magnetic properties and shapes, IUPAC nomenclature of mononuclear coordination compounds. Bonding, Werner’s theory, VBT, and CFT; structure and stereoisomerism, the importance of coordination compounds (in qualitative analysis, extraction of metals and biological system).

Unit X: Haloalkanes and Haloarenes (15 Periods)

Haloalkanes: Nomenclature, nature of C–X bond, physical and chemical properties, optical rotation mechanism of substitution reactions.

Haloarenes: Nature of C–X bond, substitution reactions (Directive influence of halogen in monosubstituted compounds only). Uses and environmental effects of – dichloromethane, trichloromethane, tetrachloromethane, iodoform, freons, DDT.

Unit XI: Alcohols, Phenols and Ethers (14 Periods)

Alcohols: Nomenclature, methods of preparation, physical and chemical properties (of primary alcohols only), identification of primary, secondary and tertiary alcohols, mechanism of dehydration, uses with special reference to methanol and ethanol.

Phenols: Nomenclature, methods of preparation, physical and chemical properties, acidic nature of phenol, electrophilic substitution reactions, uses of phenols.

Ethers: Nomenclature, methods of preparation, physical and chemical properties, uses.

Unit XII: Aldehydes, Ketones and Carboxylic Acids (15 Periods)

Aldehydes and Ketones: Nomenclature, nature of carbonyl group, methods of preparation, physical and chemical properties, mechanism of nucleophilic addition, reactivity of alpha hydrogen in aldehydes, uses.

Carboxylic Acids: Nomenclature, acidic nature, methods of preparation, physical and chemical properties; uses.

Unit XIII: Amines (14 Periods)

Amines: Nomenclature, classification, structure, methods of preparation, physical and chemical properties, uses, identification of primary, secondary and tertiary amines

Diazonium salts: Preparation, chemical reactions and importance in synthetic organic chemistry.

Unit XIV: Biomolecules (18 Periods)

Carbohydrates – Classification (aldoses and ketoses), monosaccharides (glucose and fructose), D-L configuration oligosaccharides (sucrose, lactose, maltose), polysaccharides (starch, cellulose, glycogen); Importance of carbohydrates.

Proteins – Elementary idea of – amino acids, peptide bond, polypeptides, proteins, structure of proteins – primary, secondary, tertiary structure and quaternary structures (qualitative idea only), denaturation of proteins; enzymes.

Hormones – Elementary idea excluding structure.

Vitamins – Classification and functions.

Nucleic Acids: DNA and RNA.

FAQ on Class 12 Chemistry Case Study Questions

Q: can i rely solely on class 12 chemistry case study based questions exam preparation.

Yes, case study-based questions are an essential part of your preparation. However, it is advisable to supplement them with other study materials and revision of theoretical concepts for comprehensive preparation.

Q: How often should I practice Class 12 Chemistry Case Study Based Questions?

Frequent practice is crucial for mastering case study-based questions. Set aside dedicated practice sessions and gradually increase the difficulty level of the questions.

Q: Can I discuss case study questions with my teachers?

Absolutely! Engaging with your teachers regarding case study questions will provide valuable insights and clarifications.

Mcq questions for class 12 with answers for all subjects, poets and pancakes summary class 12 english pdf, mcq class 12 english my mother at sixty-six questions with answers english poem 1, leave a reply cancel reply.

Save my name, email, and website in this browser for the next time I comment.

This site uses Akismet to reduce spam. Learn how your comment data is processed .

The Topper Combo Flashcards

Contains the Latest NCERT in just 350 flashcards.
Colourful and Interactive
Summarised Important reactions according to the latest PYQs of NEET(UG) and JEE

No thanks, I’m not interested!

Not Able To Find Desired Paper or Worksheet SEARCH

Find papers & worksheets search, case study questions for class 12 chemistry chapter 3 electrochemistry.

(0) Comments
10 Downloads

Related Papers

Click to view more related papers, display_name = "class 11" && $paper->display_name = "class 12") { // echo $paper->display_name." questions papers and worksheets"; } //else { // echo $paper->display_name." sample papers and previous year papers"; //} //>, important questions, mcq's, ncert solutions - class 12 chemistry.

Get here all the Important questions for Class 12 Chemistry chapter wise as free PDF download. Here you will get Extra Important Questions with answers, Numericals and Multiple Choice Questions (MCQ's) chapter wise in Printable format. Solving Chapter wise questions is one of the best ways to prepare for the examination. Students are advised to understand the concepts and theories of Chemistry properly before the exam. You can easily find 1 Mark, 2 marks, 3 marks, and 5 marks questions from each chapter of Class 12 Chemistry and prepare for exam more effectively. These preparation material for Class 12 Chemistry , shared by teachers, parents and students, are as per latest NCERT and CBSE Pattern syllabus and assure great success in achieving high score in Final CBSE Board Examinations.

Latest MCQ's and Important Questions for CBSE Class 12 Chemistry

class 12 chemistry chapter 1 important questions with answers class 12 chemistry chapter 2 important questions with answers class 12 chemistry chapter 3 important questions with answers class 12 chemistry chapter 4 important questions with answers class 12 chemistry chapter 5 important questions with answers class 12 chemistry chapter 6 important questions with answers class 12 chemistry chapter 7 important questions with answers class 12 chemistry chapter 8 important questions with answers class 12 chemistry chapter 9 important questions with answers class 12 chemistry chapter 10 important questions with answers class 12 chemistry chapter 11 important questions with answers class 12 chemistry chapter 12 important questions with answers class 12 chemistry chapter 13 important questions with answers class 12 chemistry chapter 14 important questions with answers class 12 chemistry chapter 15 important questions with answers class 12 chemistry chapter 16 important questions with answers mcqs of chemistry class 12 chapter 1 mcqs of chemistry class 12 chapter 2 mcqs of chemistry class 12 chapter 3 mcqs of chemistry class 12 chapter 4 mcqs of chemistry class 12 chapter 5 mcqs of chemistry class 12 chapter 6 mcqs of chemistry class 12 chapter 7 mcqs of chemistry class 12 chapter 8 mcqs of chemistry class 12 chapter 9 mcqs of chemistry class 12 chapter 10 mcqs of chemistry class 12 chapter 11 mcqs of chemistry class 12 chapter 12 mcqs of chemistry class 12 chapter 13 mcqs of chemistry class 12 chapter 14 mcqs of chemistry class 12 chapter 15 mcqs of chemistry class 12 chapter 16 The Solid State Class 12 Case Study Questions Solutions Class 12 Case Study Questions Notes Electrochemistry Class 12 Case Study Questions Chemical Kinetics Class 12 Case Study Questions Surface Notes Class 12 Case Study Questions General Principles and Processes of Isolation of Elements Class 12 Case Study Questions The p-Block Elements Class 12 Case Study Questions The d and f Block Elements Class 12 Case Study Questions Coordination Compounds Class 12 Case Study Questions Haloalkanes and Haloarenes Class 12 Case Study Questions Alcohols, Phenols and Ethers Class 12 Case Study Questions Aldehydes, Ketones and Carboxylic Acids Class 12 Case Study Questions Amines Class 12 Case Study Questions Biomolecules Class 12 Case Study Questions Polymers Class 12 Case Study Questions Chemistry in Everyday Life Class 12 Case Study Questions

Total Papers :

CBSE Class 12 Chemistry Syllabus

Solid State
Electrochemistry
Chemical Kinetics
Surface Chemistry
General Principles and Processes of Isolation of Elements
p-Block Elements
d- and f-Block Elements
Coordination Compounds
Haloalkanes and Haloarenes.
Alcohols, Phenols and Ethers
Aldehydes, Ketones and Carboxylic Acids
Organic compounds containing Nitrogen
Biomolecules
Chemistry in Everyday life

Unit II: Solutions 15 Periods

Types of solutions, expression of concentration of solutions of solids in liquids, solubility of gases in liquids, solid solutions, Raoult's law, colligative properties - relative lowering of vapour pressure, elevation of boiling point, depression of freezing point, osmotic pressure, determination of molecular masses using colligative properties, abnormal molecular mass, Van't Hoff factor.

Unit III: Electrochemistry 18 Periods

Redox reactions, EMF of a cell, standard electrode potential, Nernst equation and its application to chemical cells, Relation between Gibbs energy change and EMF of a cell, conductance in electrolytic solutions, specific and molar conductivity, variations of conductivity with concentration, Kohlrausch's Law, electrolysis and law of electrolysis (elementary idea), dry cell-electrolytic cells and Galvanic cells, lead accumulator, fuel cells, corrosion.

Unit IV: Chemical Kinetics 15 Periods

Unit VIII: d and f Block Elements 18 Periods

Lanthanoids – Electronic configuration, oxidation states, chemical reactivity and lanthanoid contraction and its consequences.

Actinoids - Electronic configuration, oxidation states and comparison with lanthanoids.

Unit IX: Coordination Compounds 18 Periods

Coordination compounds - Introduction, ligands, coordination number, colour, magnetic properties and shapes, IUPAC nomenclature of mononuclear coordination compounds. Bonding, Werner's theory, VBT, and CFT; structure and stereoisomerism, the importance of coordination compounds (in qualitative analysis, extraction of metals and biological system).

Unit X: Haloalkanes and Haloarenes. 15 Periods Haloalkanes: Nomenclature, nature of C–X bond, physical and chemical properties, optical rotation mechanism of substitution reactions.

Haloarenes: Nature of C–X bond, substitution reactions (Directive influence of halogen in monosubstituted compounds only). Uses and environmental effects of - dichloromethane, trichloromethane, tetrachloromethane, iodoform, freons, DDT.

Unit XI: Alcohols, Phenols and Ethers 14 Periods

Phenols: Nomenclature, methods of preparation, physical and chemical properties, acidic nature of phenol, electrophilic substitution reactions, uses of phenols.

Ethers: Nomenclature, methods of preparation, physical and chemical properties, uses.

Unit XII: Aldehydes, Ketones and Carboxylic Acids 15 Periods

Carboxylic Acids: Nomenclature, acidic nature, methods of preparation, physical and chemical properties; uses.

Unit XIII: Amines 14 Periods

Amines: Nomenclature, classification, structure, methods of preparation, physical and chemical properties, uses, identification of primary, secondary and tertiary amines.

Diazonium salts: Preparation, chemical reactions and importance in synthetic organic chemistry.

Unit XIV: Biomolecules 18 Periods

Carbohydrates - Classification (aldoses and ketoses), monosaccharides (glucose and fructose), D-L configuration oligosaccharides (sucrose, lactose, maltose), polysaccharides (starch, cellulose, glycogen); Importance of carbohydrates.

Proteins - Elementary idea of - amino acids, peptide bond, polypeptides, proteins, structure of proteins - primary, secondary, tertiary structure and quaternary structures (qualitative idea only), denaturation of proteins; enzymes. Hormones - Elementary idea excluding structure.

Vitamins - Classification and functions. Nucleic Acids: DNA and RNA.

Structure of CBSE Chemistry Sample Paper for Class 12 Science is

For Preparation of exams students can also check out other resource material

CBSE Class 12 Chemistry Sample Papers

CBSE Class 12 Chemistry Worksheets

CBSE Class 12 Chemistry Question Papers

CBSE Class 12 Chemistry Test Papers

CBSE Class 12 Chemistry Revision Notes

Question Bank of Other Subjects of Class 12

Importance of Question Bank for Exam Preparation?

There are many ways to ascertain whether a student has understood the important points and topics of a particular chapter and is he or she well prepared for exams and tests of that particular chapter. Apart from reference books and notes, Question Banks are very effective study materials for exam preparation. When a student tries to attempt and solve all the important questions of any particular subject , it becomes very easy to gauge how much well the topics have been understood and what kind of questions are asked in exams related to that chapter.. Some of the other advantaging factors of Question Banks are as follows

Since Important questions included in question bank are collections of questions that were asked in previous exams and tests thus when a student tries to attempt them they get a complete idea about what type of questions are usually asked and whether they have learned the topics well enough. This gives them an edge to prepare well for the exam.Students get the clear idea whether the questions framed from any particular chapter are mostly either short or long answer type questions or multiple choice based and also marks weightage of any particular chapter in final exams.
CBSE Question Banks are great tools to help in analysis for Exams. As it has a collection of important questions that were asked previously in exams thereby it covers every question from most of the important topics. Thus solving questions from the question bank helps students in analysing their preparation levels for the exam. However the practice should be done in a way that first the set of questions on any particular chapter are solved and then solutions should be consulted to get an analysis of their strong and weak points. This ensures that they are more clear about what to answer and what can be avoided on the day of the exam.
Solving a lot of different types of important questions gives students a clear idea of what are the main important topics of any particular chapter that needs to focussed on from examination perspective and should be emphasised on for revision before attempting the final paper. So attempting most frequently asked questions and important questions helps students to prepare well for almost everything in that subject.
Although students cover up all the chapters included in the course syllabus by the end of the session, sometimes revision becomes a time consuming and difficult process. Thus, practicing important questions from Question Bank allows students to check the preparation status of each and every small topic in a chapter. Doing that ensures quick and easy insight into all the important questions and topics in each and every individual. Solving the important questions also acts as the revision process.

Question Bank of Other Classes

To Prepare better for CBSE paperclass; ?> " title="Download Free CBSE Papers">Ribblu.com brings to you all the previous years papers & worksheets of subject; ?//> for CBSE paperclass; ?>. This CBSE paper and worksheet can be instrumental in students achieving maximum marks in their exams. These Papers and worksheets help students gain confidence and make them ready to face their school examinations. These Papers and worksheets school wise, covers important concepts from an examination perspective. Students and parents can download all the available papers & worksheets directly in the form of PDF. One can use these papers and worksheets to get extensive practice and familiarise themselves with the format of the question paper.

You can help other users

Be the first to write comment .

Upload papers and the more your paper get downloaded the more you earn the points

You may send papers on email [email protected] along with userid

Downloaded by: Vandana Dubey
Downloaded by: Rabindra Nath Das
Downloaded by: Khushi Khushi

Rules and regulations for uploads

Write your comment, report this paper, how to earn points.

Upload Papers / Worksheets and Earn 50 Points.

The uploaded material should be original paper or worksheet of any school. Check out some videos on how to upload papers on ribblu

Rate & Review your school and Earn 25 Points.

Review any school that you may be knowing and once your review is approved, you will be credited with 25 points.

Answer on question posted on JustAsk and earn 15 points.

JustAsk is a platform where you can help others to find answers of any question. Share your Knowledge. Answer questions and once approved you will earn 15 points

Complete your profile and earn upto 25 Points.

Edit and complete your user profile and earn points. The more details you submit, the more points you will earn.

Download Ribblu Mobile App and you will (Earn 20 Points) (one time only)

CBSE Schools

CBSE Schools In Delhi
CBSE Schools In Noida
CBSE Schools In Greater Noida
CBSE Schools In Faridabad
CBSE Schools In Ghaziabad
CBSE Schools In Gurgaon
CBSE Schools In Mumbai
CBSE Schools In Pune
CBSE Schools In Bangalore
CBSE Schools In Hyderabad
CBSE Schools In Kolkata
CBSE Schools In Chennai
CBSE Schools In Patna
CBSE Schools In Meerut
CBSE Schools In Kanpur
CBSE Schools In Indore
CBSE Schools In Ludhiana
CBSE Schools In Dehradun

Top Schools

Schools In Delhi
Schools In Noida
Schools In Greater Noida
Schools In Faridabad
Schools In Ghaziabad
Schools In Gurgaon
Schools In Mumbai
Schools In Pune
Schools In Bangalore
Schools In Hyderabad
Schools In Kolkata
Schools In Chennai
Schools In Patna
Schools In Meerut
Schools In Kanpur
Schools In Indore
Schools In Ludhiana
Schools In Dehradun

Other Schools

Pre Nursery Schools In Noida
Day Boarding Schools In Noida
Pre Nursery Schools In Gurgaon
Pre Nursery Schools In Delhi
Play Schools In Delhi
Day Boarding Schools In Delhi

CBSE Papers

CBSE Class 1 Sample Papers
CBSE Class 2 Sample Papers
CBSE Class 3 Sample Papers
CBSE Class 4 Sample Papers
CBSE Class 5 Sample Papers
CBSE Class 6 Sample Papers
CBSE Class 7 Sample Papers
CBSE Class 8 Sample Papers

Case Study Questions for Class 12 Chemistry Chapter 3 Electrochemistry

CBSE Expert

CBSE Class 12 Chemistry Case Study Questions PDF

Case studies play a pivotal role in CBSE Class 12 Chemistry, as they enable students to apply theoretical knowledge to real-life scenarios. CBSE Class 12 Chemistry Case Study Questions PDF section introduces the significance of case studies in enhancing analytical skills and understanding complex chemical reactions.

Case studies challenge students to think critically, analyze experimental data, and devise problem-solving strategies. They provide a deeper understanding of chemical principles and their practical applications, fostering a holistic learning experience. Familiarize yourself with the structure of case study questions to streamline your preparation. Each case study presents a unique chemical problem, encouraging students to identify relevant concepts and devise accurate solutions.

Table of Contents

Class 12 Chemistry Case Study Questions

CBSE Class 12 Chemistry question paper will have case study questions too. These case-based questions will be objective type in nature. So, Class 12 Chemistry students must prepare themselves for such questions. First of all, you should study NCERT Textbooks line by line, and then you should practice as many questions as possible.

Chapter-wise Solved Case Study Questions for Class 12 Chemistry

Class 12 students should go through important Case Study problems for Chemistry before the exams. This will help them to understand the type of Case Study questions that can be asked in Grade 12 Chemistry examinations. Our expert faculty for standard 12 Chemistry have designed these questions based on the trend of questions that have been asked in last year’s exams. The solutions have been designed in a manner to help the grade 12 students understand the concepts and also easy-to-learn solutions.

Tips to Excel in CBSE Class 12 Chemistry Examinations

Excel in your Chemistry exams with these practical tips.

A. Regular Practice with Case Studies

Consistent practice with case study questions enhances your ability to tackle complex problems. Dedicate time to solving various case studies to build confidence.

B. Understanding Analytical Skills

Develop strong analytical skills to approach case studies logically. Break down complex problems into simpler components and analyze them step-by-step.

C. Time Management Strategies

Allocate sufficient time for each case study during the exam. Practice time management in mock tests to complete the paper within the stipulated time.

Best Books for Class 12 Chemistry

Strictly as per the new term-wise syllabus for Board Examinations to be held in the academic session 2024 for class 12 Multiple Choice Questions based on new typologies introduced by the board- Stand-Alone MCQs, MCQs based on Assertion-Reason Case-based MCQs. Include Questions from CBSE official Question Bank released in April 2024 Answer key with Explanations What are the updates in the book: Strictly as per the Term wise syllabus for Board Examinations to be held in the academic session 2024. Chapter-wise -Topic-wise Multiple choice questions based on the special scheme of assessment for Board Examination for Class 12th Chemistry.

Mastering CBSE Class 12 Chemistry case study questions is crucial for excelling in the exams. Embrace case studies as a valuable learning tool, and with practice, you’ll ace your Chemistry exams with confidence.

Benefits of Utilizing the CBSE Class 12 Chemistry Case Study PDF

Enhanced Learning Experience : The case study PDF offers practical examples and scenarios, making the learning process engaging and relatable for students.
Application of Theoretical Concepts : It enables students to apply theoretical knowledge to practical situations, honing their problem-solving and analytical skills.
Real-World Relevance : By connecting classroom learning to real-life applications, students can grasp the practical significance of chemistry in various industries.
Critical Thinking Development : Analyzing case studies encourages students to think critically and make informed decisions based on chemical principles.
Exam Preparation : Exposure to case studies aids in better preparation for chemistry examinations by providing a comprehensive understanding of the subject.

The CBSE Class 12 Chemistry case study PDF brings a refreshing perspective to the world of education. By intertwining theoretical knowledge with practical applications, it equips students to face real-world challenges with confidence. The diverse case studies provide invaluable insights, encouraging students to explore chemistry beyond the classroom and make a positive impact on society.

What is the CBSE Class 12 Chemistry case study PDF?

The CBSE Class 12 Chemistry case study PDF is a curated document by CBSE, presenting real-life applications of chemistry concepts for students to understand the subject’s practical relevance.

How does the case study PDF benefit students?

The case study PDF enhances the learning experience, fosters critical thinking, promotes application-based learning, and prepares students for examinations.

Are the case studies diverse in content?

Yes, the case studies cover various branches of chemistry, including organic, inorganic, physical, environmental, and analytical chemistry.

Download India's best Exam Preparation App Now.

Key Features

Revision Notes
Important Questions
Previous Years Questions
Case-Based Questions
Assertion and Reason Questions

No thanks, I’m not interested!

If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

To log in and use all the features of Khan Academy, please enable JavaScript in your browser.

Unit 1: Electrochemistry

Galvanic cells.

Redox reaction from dissolving zinc in copper sulfate (Opens a modal)
Introduction to galvanic/voltaic cells (Opens a modal)
Electrodes and voltage of Galvanic cell (Opens a modal)
Shorthand notation for galvanic/voltaic cells (Opens a modal)

Standard cell potentials

Using reduction potentials (Opens a modal)
Standard reduction potentials (Opens a modal)
Voltage as an intensive property (Opens a modal)
Spontaneity and redox reactions (Opens a modal)
Free energy and cell potential (Opens a modal)
Worked example: Constructing a galvanic cell using reduction potential values (Opens a modal)
Worked example: Identifying the best oxidising agent using Eo(red.) values. (Opens a modal)
Applications of electrode potentials Get 3 of 4 questions to level up!

Cell potentials at non standard conditions- Nernst Equation

Galvanic cells and changes in free energy (Opens a modal)
Nernst equation (Opens a modal)
Using the Nernst equation (Opens a modal)
Worked example- Calculating Ecell for the given cell. (Opens a modal)
Concentration cell (Opens a modal)
Calculating Cell Potentials using the Nernst Equation Get 3 of 4 questions to level up!
Concentration cells Get 3 of 4 questions to level up!

Standard cell potential and equilibrium constant

Standard cell potential and the equilibrium constant (Opens a modal)
Calculating the equilibrium constant from the standard cell potential (Opens a modal)
Standard cell potentials and equilibrium constants Get 3 of 4 questions to level up!

Electrolytic cell and electrolysis

Introduction to electrolysis (Opens a modal)
Types of Conductance. (Opens a modal)
Variation of conductivity part 1 (Opens a modal)
Variation of conductivity part 2 (Opens a modal)
Kohlrausch's law of independent migration (Opens a modal)
Calculating various types of conductivities. Get 3 of 4 questions to level up!
Applications of Kohlaursch's law Get 3 of 4 questions to level up!

Quantitative aspect of electrolysis- Faraday's laws

Quantitative electrolysis (Opens a modal)
Faraday's First law of Electrolysis (Opens a modal)
Faraday's Second Law of Electrolysis (Opens a modal)
Electrolysis of molten sodium chloride (Opens a modal)
Electrolysis of aqueous NaCl (Opens a modal)
Applications of Faraday's laws of electrolysis -1 Get 3 of 4 questions to level up!
Application of Faraday's Laws-2 Get 3 of 4 questions to level up!

Commercial cells

Lead storage battery (Opens a modal)
Nickel-cadmium battery (Opens a modal)

Gurukul of Excellence

Classes for Physics, Chemistry and Mathematics by IITians

Tag: case study questions on electrochemistry

Join our Telegram Channel for Free PDF Download

Case Study Questions for Class 12 Chemistry Chapter 3 Electrochemistry

Join our Online Test Series for CBSE, ICSE, JEE, NEET and Other Exams

Editable Study Materials for Your Institute - CBSE, ICSE, State Boards (Maharashtra & Karnataka), JEE, NEET, FOUNDATION, OLYMPIADS, PPTs

Important Questions
Class 12 - Chemistry
Chapter 3: Electrochemistry

Important Questions for Class 12 Chemistry Chapter 3 - Electrochemistry

Class 12 chemistry important questions with answers are provided here for chapter 3 Electrochemistry. These important questions are based on CBSE board curriculum and correspond to the most recent Class 12 chemistry syllabus. By practicing these Class 12 important questions, students will be able to quickly review all of the ideas covered in the chapter and prepare for the Class 12 Annual examinations as well as other entrance exams such as NEET and JEE.

Download Class 12 Chemistry Chapter 3 – Electrochemistry Important Questions with Answers PDF by clicking on the button below.

Download PDF

Class 12 Electrochemistry Important Questions with Answers

Short answer type questions.

1. Can absolute electrode potential of an electrode be measured?

Solution: No, the absolute potential of an electrode can not be measured because the half-cell containing a single electrode cannot work on its own. It can work only in combination with another half cell.

2. Can E 0 cell or Δ r G 0 for a cell reaction ever be equal to zero?

Solution: No, it cannot be equal to zero for a cell reaction proceeding in a particular direction (forward or backward direction)

3. Under what conditions is E 0 cell = 0 and Δ r G 0 = 0 ?

Solution: At the condition of equilibrium, E 0 cell = 0 and Δ r G 0 = 0

4. What does the negative sign in the expression E 0 Zn2+ /Zn = – 0.76 V means?

Solution: It implies that Zn is more reactive than hydrogen or it is a stronger reducing agent. In a cell containing zinc electrode and standard hydrogen electrode present in two half cells, zinc will be oxidised to Zn 2+ ions while H + ions will get reduced to hydrogen.

5. Aqueous copper sulphate solution and aqueous silver nitrate solution are electrolysed by 1 ampere current for 10 minutes in separate electrolytic cells. Will the mass of copper and silver deposited on the cathode be same or different ? Explain your answer.

Solution: The mass of copper and silver deposited on the cathode in the two electrolytic cells will not be the same.

According to second law of Electrolysis.

(Mass of Cu deposited /mass of Ag deposited) = (equivalent mass of Cu/equivalent mass of Ag)

= 31.75/ 108.

6. Depict the galvanic cell in which the cell reaction is : Cu + 2Ag + → 2Ag + Cu 2+ .

Solution: In the cell reaction: Cu + 2Ag + → 2Ag + Cu 2+

At anode : Cu → Cu 2+ + 2e

At Cathode : 2 Ag + + 2e → 2Ag

The representation of cell = Cu(s) | Cu 2+ (aq) || Ag + (aq) | Ag (s)

7. Value of standard electrode potential for the oxidation of Cl – ions is more positive than that of water, even then in the electrolysis of aqueous sodium chloride, why are Cl – ions oxidised at anode instead of water ?

Solution: The oxidation reactions taking place at anode is:

2Cl – (aq) → Cl 2 (g) + 2e – E 0 (oxid) = -1.36 V

2H 2 O (l) → O 2 (g) + 4H + (aq) + 4e – E 0 (oxid) = -1.23 V

Due to the overvoltage of oxygen (O₂), its liberation is kinetically slower than that of CI ions. Therefore, Cl ions are oxidised to Cl₂ gas.

8. What is electrode potential ?

Solution: Electrode potential appears at the interface between an electrode and electrolyte due to the transfer of charged species across the interface.

9. Why is alternating current used for measuring resistance of an electrolytic solution?

Solution: Alternate current is used for measuring the resistance of an electrolytic solution because direct current will cause the electrolysis of the electrolyte. As a result Concentration of the ions in the solution will change.

10. How will the pH of brine (NaCl solution) be affected when it is electrolysed?

Solution: NaCl is a salt of strong acid and strong base. It is neutral in nature. pH of NaCl solution is 7. However, upon electrolysis of the aqueous solution, Na + and OH – ions are formed. The solution becomes basic and its pH rises.

11. Solutions of two electrolytes ‘A’ and ‘B’ are diluted. The Λ m of ‘B’ increases 1.5 times while that of A increases 25 times. Which of the two is a strong electrolyte? Justify your answer.

Solution: Dilution of the electrolyte mainly decreases interionic attractive force, therefore Λ m increases. In case of strong electrolyte it dissociated completely in solution so on dilution Λ m increases to a small extent. On the other hand, the electrolyte weak is ionised only to a small extent. Upon dilution, its ionisation or dissociation increases to a large extent. That is why, Λ m for weak electrolyte is more higher on dilution.

From the available information A is a weak electrolytes and B is a strong electrolyte.

12. In an aqueous solution how does specific conductivity of electrolytes change with addition of water?

Solution: The specific conductivity or conductivity (🇰) of electrolytes decreases with the addition of water or upon dilution because the number of ions per unit volume decrease.

13. Which reference electrode is used to measure the electrode potential of other electrodes ?

Solution : Standard hydrogen electrode (SHE) is used as reference electrode to measure the electrode potential of other electrodes. Its electrode potential is assumed as zero. The electrode potential of any electrode as measured with respect to a standard hydrogen electrode is known as its standard electrode potential (E).

14. Consider a cell given below

Cu |Cu²+ || Cl- | Cl₂, Pt

Write the reactions that occur at anode and cathode.

Solution: The reaction taking place at the two electrodes are:

At anode : Cu(s) → Cu 2+ (aq) + 2e –

At cathode: Cl 2 (g) + 2e – → 2 Cl –

15. Write the Nernst equation for the cell reaction in the Daniell cell. How will the E cell be affected when concentration of Zn 2+ ions is increased ?

Solution: Daniell cell involves the redox reaction :

Zn(s) + CuSO 4 (aq) → ZnSO 4 (aq) + Cu(s)

Thus in the cell Zn(s) is oxidised to Zn²+ (aq) ions in the oxidation half cell while Cu²+ (aq) ions are reduced to Cu(s) in the reduction half cell.

According to Nernst equation,

Hence E cell decreases as the [Zn 2+ (aq)] increases.

16. What advantage do the fuel cells have over primary and secondary batteries?

Solution: Primary batteries or cells contain a limited amount of reactants and are discharged when the reactants are consumed. Secondary batteries or cells can be recharged but the process takes a long time. Fuel cells work continuously as long the reactants (i.e. fuel) are supplied.

17. Write the cell reaction of a lead storage battery when it is discharged. How does the density of the electrolyte change when the battery is discharged?

Solution: The cell reaction of a lead storage battery when it is discharged, may be given as:

Pb(s) + 4H + (aq) + 2SO 4 2- (aq) → PbO₂(s) + 2PbSO4 (s) + 2H₂O(l)

Density of the electrolyte i.e. conc.H 2 SO 4 solution decreases because of the dilution of electrolyte taking place since water is formed as one of the products.

18. Why on dilution the Λ m of CH 3 COOH increases drastically, while that of CH 3 COONa increases gradually?

Solution: CH 3 COOH is a weak electrolyte and is dissociated to small extent. With dilution, its degree of dissociation increases i.e. more ions are released in solution. Therefore, Λ m of CH 3 COOH increases drastically. On the other hand, CH 3 COONa is a strong electrolyte and is almost completely dissociated in aqueous solution. With dilution, only interionic forces of attraction increase resulting in only small increase in the value of Λ m .

Matching Types Questions

1. Match the terms given in Column I with the units given in Column II.

Solution: (a) – (iii); (b) – (iv); (c) – (i); (d) – (ii)

2. Match the items of Column I and Column II.

Solution: (a) – (iv); (b) – (iii); (c) – (i); (d) – (ii)

3. Match the items of Column I and Column II.

Solution: (a) – (iv); (b) – (iii); (c) – (ii); (d) – (i)

4. Match the items of Column I and Column II.

Solution: (a) – (iv); (b) – (iii); (c) – (i),(v); (d) – (ii)

Assertion-Reason Type Questions

Note: In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices:

(a) Both assertion and reason are true and the reason is correct explanation for assertion.

(b) Both assertion and reason are true and the reason is not correct explanation for assertion.

(d) Both assertion and reason are false.

(e) Assertion is false but reason is true.

1. Assertion : Cu is less reactive than hydrogen.

Reason : E 0 Cu2+/Cu is negative.

Solution: (c) Assertion is true but the reason is false.

2. Assertion: E cell should have a positive value for the cell to function.

Reason: E cathode < E anode

3. Assertion : Conductivity of all electrolytes decreases on dilution.

Reason : On dilution number of ions per unit volume decreases.

Solution: (a) Both assertion and reason are true and the reason is correct explanation for assertion.

4. Assertion : Λ m for weak electrolytes shows a sharp increase when the electrolytic solution is diluted.

Reason : For weak electrolytes degree of dissociation increases with dilution of solution.

5. Assertion :Mercury cell does not give steady potential.

Reason: In the cell reaction, ions are not involved in solution.

Solution: (e) Assertion is false but reason is true.

Long Answer Types Questions

1. Define the terms specific conductance, molar conductance and equivalent conductance. Derive the relationship between molar conductance and equivalent conductance.

(a) Specific conductance:

The reciprocal of specific resistance is termed as specific conductance or it is the conductance of one centimeter cube of a conductor.

It is denoted by the symbol 🇰 (kappa).

🇰 = 1/ρ or 🇰 = (l/a) x C

Specific conductance is also called conductivity.

(b) Molar conductance:

Molar conductance is defined as the conductance of all the ions produced by ionisation of 1 g- mole of an electrolyte when present in per litre of solution. It is denoted by Λ m .

Molar conductance Λ m = k x 1000/M

Equivalent conductance is defined as the conductance of all ions produced by one gram-equivalent of an electrolyte present per litre of solution. It is denoted by Λ eq .

Equivalent conductance Λ eq = k x 1000/N.

Relationship between molar conductance and equivalent conductance.

Λ m = k x 1000/M , Λ eq = k x 1000/N

∴ Λ m / Λ eq = n

Where n= valence factor.

2. State Kohlrausch’s law. How does the law help in calculating Λ 0 ∞ CH 3 COOH ?

At infinite dilution, when dissociation is complete, each ion makes a definite contribution towards equivalent conductance of the electrolyte irrespective of the nature of the ion with which it is associated and the value of equivalent conductance at infinite dilution for any electrolyte is the sum of contribution of its constituent ions”, i. e. anions and cations.

Λ ∞ = λ a + λ c

The λ a and λ c are called the ionic conductances of cation and a anion at infinite dilution respectively.

The molar conductivity of an strong electrolyte at infinite dilution is the sum of the ionic conductivity of the cations and anions.

In case of weak electrolytes, it is not possible to determine the value of limiting molar conductance at infinite dilution. However this can be determine by using Kohlrausch’s law.

Example CH3COOH is a weak electrolyte.

Λ ∞ m (CH3COOH) = λ m ∞ (CH3COO-) + λ m ∞ (H + )

= Λ ∞ m (CH3COONa) + Λ ∞ m (HCl) – Λ ∞ m (NaCl)

3. What is the relationship between Gibbs free energy of the cell reaction in a galvanic cell and the emf or E cell ? When will the maximum work be obtained from a galvanic cell ?

The relation may be given as :

ΔG = -nF E cell

If the redox reaction is under standard conditions, then

ΔG° = -nFE cell

Here nF is the quantity of charge passed. In case we want to obtain maximum work from the galvanic charge has to be passed reversibly. As pointed above, the reversible work done by the galvanic cell is equal decrease in its Gibbs free energy.

4. What is Nernst equation ? write the Nernst equation for the reaction.

2Cr(s) + 3Cd 2+ (aq) → 2Cr 3+ (aq) + 3Cd (s)

Nernst equation is an equation relating the capacity of an atom/ion to take up one or more electrons (reduction potential) measured at any conditions to that measured at standard conditions (standard reduction potentials) of 298K and one molar or one atmospheric pressure .

E cell = E 0 – [RT/nF] ln Q

E cell = cell potential of the cell

E 0 = cell potential under standard conditions

R = universal gas constant

T = temperature

n = number of electrons transferred in the redox reaction

F = Faraday constant

Q = reaction quotient

In the equation : 2Cr(s) + 3Cd 2+ (aq) → 2Cr 3+ (aq) + 3Cd (s)

E cell = E 0 – [RT/nF] ln {[Cr 3+ ] 2 /[Cd 2+ ] 3 }

5. State Faraday’s first law of electrolysis. How much charge in terms of Faraday is required for reduction of 1 mole of Cu 2+ ions to Cu?

When an electric current is passed through an electrolyte, the amount of substance deposited is proportional to the quantity of electric charge passed through the electrolyte.

If W be the mass of the substance deposited by passing Q coulomb of charge, then according to the law, we have the relation:

A coulomb is the quantity of charge when a current of one ampere is passed for one second. Thus, amount of charge in coulombs,

Q = current in amperes x time in seconds

W = Z x I x t

where, Z is a constant, known as electrochemical equivalent, and is characteristic of the substance deposited.

When a current of one ampere is passed for one second,i.e one coulomb (Q = 1), then

The electrode reaction is Cu 2+ + 2e−→Cu

∴ quantity of charge required for reduction of 1 mole of Cu2+ =2F

Cu 2+ =2F =2×96500=193000C

Put your understanding of this concept to test by answering a few MCQs. Click ‘Start Quiz’ to begin!

Select the correct answer and click on the “Finish” button Check your score and answers at the end of the quiz

Visit BYJU’S for all Chemistry related queries and study materials

Your result is as below

Request OTP on Voice Call

Register with BYJU'S & Download Free PDFs

Neet Online Test Pack

12th Standard stateboard question papers & Study material

தமிழ் subjects.

கணினி பயன்பாடுகள்

கணினி அறிவியல்

வணிகக் கணிதம் மற்றும் புள்ளியியல்.

கணினி தொழில்நுட்பம்

கணக்குப்பதிவியல்

English Subjects

Computer Science

Business Maths and Statistics

Accountancy

Computer Applications

Computer Technology

11th Standard stateboard question papers & Study material

9th Standard stateboard question papers & Study material

Social Science

சமூக அறிவியல்

6th standard stateboard question papers & study material.

10th Standard stateboard question papers & Study material

7th Standard stateboard question papers & Study material

8th Standard stateboard question papers & Study material

கணிதம் - old

12th Standard CBSE Subject Question Paper & Study Material

Introductory Micro and Macroeconomics

Business Studies

Indian Society

Physical Education

Bio Technology

Engineering Graphics

Entrepreneurship

Hindi Elective

Home Science

Legal Studies

Political Science

11th Standard CBSE Subject Question Paper & Study Material

Mathematics

Enterprenership

Applied Mathematics

10th standard cbse subject question paper & study material.

9th Standard CBSE Subject Question Paper & Study Material

8th Standard CBSE Subject Question Paper & Study Material

7th Standard CBSE Subject Question Paper & Study Material

6th Standard CBSE Subject Question Paper & Study Material

School Exams

Tamil Nadu State Board Exams

Scholarship Exams

Study Materials , News and Scholarships

Stateboard Tamil Nadu

Free Online Tests

Educational News

Scholarships

Entrance Exams India

Video Materials

12th Standard CBSE

Class 12th Chemsitry - Electrochemistry Case Study Questions and Answers 2022 - 2023

Class 12th Chemsitry - Electrochemistry Case Study Questions and Answers 2022 - 2023 Study Materials Sep-08 , 2022

QB365 provides a detailed and simple solution for every Possible Case Study Questions in Class 12 Chemsitry Subject - Electrochemistry, CBSE. It will help Students to get more practice questions, Students can Practice these question papers in addition to score best marks.

A PHP Error was encountered

Severity: Warning

Message: in_array() expects parameter 2 to be array, null given

Filename: material/details.php

Line Number: 1436

Message: Use of undefined constant EXAM - assumed 'EXAM' (this will throw an Error in a future version of PHP)

Line Number: 1438

QB365 - Question Bank Software

Electrochemistry case study questions with answer key.

Final Semester - June 2015

Case Study

Read the passage given below and answer the following questions: Molar conductivity of ions are given as product of charge on ions to their ionic mobilities and Faraday's constant. $\lambda_{A^{n+}}=n \mu_{A^{n+}} F$ (here $\mu$ is the ionic mobility of A n+ ). For electrolytes say A X B y , molar conductivity is given by $\lambda_{m\left(A_{x} B_{y}\right)}=x_{n} \mu_{A^{n+}} F+y_{m} \lambda_{A^{m}-F}$

The following questions are multiple choice questions. Choose the most appropriate answer (i) At infinite dilution, the equivalent conductance of CaSO 4 is

(ii) If the degree of dissociation of CaSO 4 solution is 10% then equivalent conductance of CaSO 4 is

(iii) What is the unit of equivalent conductivity?

(iv) If the molar conductance value of Ca 2+ and Cl - at infinite dilution are 118.88 x 10 -4 m 2 mho mol -1 and 77.33 x 10 -4 m 2 mho mol -1 respectively then the molar conductance of CaCl 2 (in m 2 mho mol -1 ) will be

Read the passage given below and answer the following questions: Standard electrode potentials are used for various processes: (i) It is used to measure relative strengths of various oxidants and reductants. (ii) It is used to calculate standard cell potential. (iii) It is used to predict possible reactions. A set of half-reactions (in acidic medium) along with their standard reduction potential, E o (in volt) values are given below $\mathrm{I}_{2}+2 e^{-} \rightarrow 2 \mathrm{I}^{-} ; \quad E^{\circ}=0.54 \mathrm{~V}$ $\mathrm{Cl}_{2}+2 e^{-} \rightarrow 2 \mathrm{Cl}^{-} ; \quad E^{\circ}=1.36 \mathrm{~V}$ $\mathrm{Mn}^{3+}+e^{-} \rightarrow \mathrm{Mn}^{2+} ; \quad E^{\circ}=1.50 \mathrm{~V}$ $\mathrm{Fe}^{3+}+e^{-} \longrightarrow \mathrm{Fe}^{2+} ; \quad E^{\circ}=0.77 \mathrm{~V}$ $\mathrm{O}_{2}+4 \mathrm{H}^{+}+4 e^{-} \longrightarrow 2 \mathrm{H}_{2} \mathrm{O} ; E^{\circ}=1.23 \mathrm{~V}$ The following questions are multiple choice questions. Choose the most appropriate answer: (i) Which of the following statements is correct?

(ii) Mn 3+ is not stable in acidic medium, while Fe 3+ is stable because

(iii) The strongest reducing agent in the aqueous solution is

(iv) The emf for the following reaction is $\mathrm{I}_{2}+\mathrm{KCl} \rightleftharpoons 2 \mathrm{KI}+\mathrm{Cl}_{2}$

Read the passage given below and answer the following questions : All chemical reactions involve interaction of atoms and molecules. A large number of atoms/molecules are present in a few gram of any chemical compound varying with their atomic/molecular masses. To handle such large number conveniently, the mole concept was introduced. All electrochemical cell reactions are also based on mole concept. For example, a 4.0 molar aqueous solution of NaCI is prepared and 500 mL of this solution is electrolysed. This leads to the evolution of chlorine gas at one of the electrode. The amount of products formed can be calculated by using mole concept. The following questions are multiple choice questions. Choose the most appropriate answer : (i) The total number of moles of chlorine gas evolved is

(ii) If cathode is a Hg electrode, then the maximum weight of amalgam formed from this solution is

(iii) In the electrolysis, the number of moles of electrons involved are

(iv) In electrolysis of aqueous NaCl solution when Pt electrode is taken, then which gas is liberated at cathode?

Read the passage given below and answer the following questions: The concentration of potassium ions inside a biological cell is at least twenty times higher than the outside. The resulting potential difference across the cell is important in several processes such as transmission of nerve impulses and maintaining the ion balance. A simple model for such a concentration cell involving a metal M is M (s) | M + (aq.; 0.05 molar) || M + (aq; 1 molar) |M (s) . The following questions are multiple choice questions. Choose the most appropriate answer: (i) For the above cell,

(ii) The value of equilibrium constant for a feasible cell reaction is

(iii) What is the emf ofthe cell when the cell reaction attains equilibrium?

(iv) The potential of an electrode change with change in

Read the passage given below and answer the following questions: The electrochemical cell shown below is concentration cell. M|M 2+ (saturated solution of a sparingly soluble salt, MX 2 ) || M 2+ (0.001 mol dm -3 ) | M The emf of the cell depends on the difference in concentrations of M 2+ ions at the two electrodes. The emf of the cell at 298 K is 0.059 V. The following questions are multiple choice questions. Choose the most appropriate answer: (i) The solubility product (K sp, mol 3 dm -9 ) of MX 2 at 298 K based on the information available for the given concentration cell is (take 2.303 x R x 298/P = 0.059)

(ii) The value of $\Delta G$ (in kJ mol -1 ) for the given cell is (take 1F = 96500 C mol -1 )

(iii) The equilibrium constant for the following reaction is $\mathrm{Fe}^{2+}+\mathrm{Ce}^{4+} \rightleftharpoons \mathrm{Ce}^{3+}+\mathrm{Fe}^{3+}$ (Given, $E^{0} \mathrm{Ce}^{4+} / \mathrm{Ce}^{3+}=1.44$ and E o $E_{\mathrm{Fe}^{3+} / \mathrm{Fe}^{2+}}=0.68 \mathrm{~V}$ )

(iv) To calculate the emf of the cell, which of the following options is correct?

Read the passage given below and answer the following questions : The potential of each electrode is known as electrode potential. Standard electrode potential is the potential when concentration of each species taking part in electrode reaction is unity and the reaction is taking place at 298 K. By convention, the standard ectrode potential of hydrogen (SHE) is 0.0 V. The electrode potential value for eacfi electrode process is a measure of relative tendency of the active species in the process to remain in the oxidisedlreduced form. The negative electrode potential means that the redox couple is stronger reducing agent than H + /H 2 couple. A positive electrode potential means that the redox couple is a weaker reducing agent than the H + /H 2 couple. Metals which have higher positive value of standard reduction potential form the oxides of greater thermal stability. In these questions (i-iv), a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices. (i) Assertion : An electrochemical cell can be set-up only if the redox reaction is spontaneous. Reason : A reaction is spontaneous if the free energy change is negative.

(ii) Assertion : The standard electrode potential of hydrogen is 0.0 V. Reason : It is by convention.

(iii) Assertion : The negative value of standard reduction potential means that reduction takes place on this electrode with reference to hydrogen electrode. Reason : The standard electrode potential of a half cell has a fixed value.

(iv) Assertion : The absolute value of electrode potential cannot be determined experimentally. Reason : The electrode potential values are generally determined with respect to SHE.

Read the passage given below and answer the following questions: Two types of conductors are generally used, metallic and electrolytic. Free electrons are the current carrier in metallic and in electrolytic conductors, free ions. Specific conductance or conductivity of an electrolytic solution is given by $\kappa=C \times \frac{l}{A}$ where, C = l/R and l/A = G* (cell constant) Molar conductance ( $\Lambda_{m}$ ) and equivalent conductance ( $\Lambda_{e}$ ) of an electrolyte solution are calculated as $\Lambda_{m}=\frac{\kappa \times 1000}{M} \text { or } \Lambda_{e}=\frac{\kappa \times 1000}{N}$ where, M = molarity of solution and Nis normality of solution. Molar conductance of strong electrolyte depends on the concentration. $\Lambda_{m}=\Lambda_{m}^{0}-b \sqrt{C}$ $\Lambda_{m}^{\circ}$ = molar conductance at infinite dilution, b = constant, C = conc of solution In these questions (i-iv), a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices. (i) Assertion : The molar conductivity of strong electrolyte decreases with increase in concentration. Reason : At high concentration, migration of ions is slow

(ii) Assertion : Equivalent conductance of all electrolytes increases with increasing concentration. Reason : More number of ions are available per gram equivalent at higher concentration.

(iii) Assertion : Specific conductance decreases with dilution whereas equivalent conductance increases. Reason : On dilution, number of ions per milli litre decreases but total number of ions increases considerably

(iv) Assertion : The ratio of specific conductivity to the observed conductance does not depend upon the concentration of the solution taken in the conductivity cell. Reason : Specific conductivity decreases with dilution whereas observed conductance increases with dilution.

Read the passage given below and answer the following questions: Electrical work done in unit time is equal to electrical potential multiplied by total charge passed. In order to obtain maximum work from a cell, the charge has to be passed reversibly. The reversible work done by a cell is equal to decrease in its Gibb's energy. Hence, Gibb's energy of reaction is given by $\Delta G=-n F E_{\text {cell }}$ Hence, E is the emf of the cell and nF is the amount of energy. In these questions (i-iv), a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices (i) Assertion : $\Delta G^{\circ}=-n F E^{\circ}$ Reason : E o should be positive for a spontaneous reaction

(ii) Assertion : An electrochemical cell can be set up only if the redox reaction is spontaneous. Reason : A reaction is spontaneous if free energy change is negative.

(iii) Assertion : Current stops flowing when E cell = 0. Reason : Equilibrium of the cell reaction is attained.

(iv) Assertion: E cell should have a positive value for the cell to function. Reason : E cell = E cathode - E anode

Read the passage given below and answer the following questions: Nernst equation relates the reduction potential of an electrochemical reaction to the standard potential and activities of the chemical species undergoing oxidation and reduction. Let us consider the reaction, $M_{(a q)}^{n+} \longrightarrow n M_{(s)}$ For this reaction, the electrode potential measured with respect to standard hydrogen electrode can be given as $E_{\left(M^{n+} / M\right)}=E_{\left(M^{n+} / M\right)}^{\circ}-\frac{R T}{n F} \ln \frac{[M]}{\left[M^{n+}\right]}$ In these questions ( i-iv), a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.

(i) Assertion : For concentration cell, $\begin{array}{c} \mathrm{Zn}_{(s)}\left|\mathrm{Zn}^{2+}{ }_{(a q)} \| \mathrm{Zn}^{2+}{ }_{(a q)}\right| \mathrm{Zn} \\ \mathrm{C}_{1} \quad \mathrm{C}_{2} \end{array}$ For spontaneous cell reaction, C 1 < C 2 . Reason : For concentration cell $E_{\text {cell }}=\frac{R T}{n F} \log \frac{C_{2}}{C_{1}}$ For spontaneous reaction, $E_{\text {cell }}=+\mathrm{ve} \Rightarrow C_{2}>C_{1}$ (ii) Assertion : For the cell reaction, $\mathrm{Zn}_{(s)}+\mathrm{Cu}_{(a q)}^{2+} \longrightarrow \mathrm{Zn}_{(a q)}^{2+}+\mathrm{Cu}_{(s)}$ voltmeter gives zero reading at equilibrium. Reason : At the equilibrium, there is no change in concentration of Cu 2+ and Zn 2+ ions. (iii) Assertion : The Nernst equation gives the concentration dependence of emf of the cell. Reason : In a cell, current flows from cathode to anode (iv) Assertion : Increase in the concentration of copper half cell in a cell, increases the emf of the cell Reason : $E_{\text {cell }}=E_{\text {cell }}^{\circ}+\frac{0.059}{2} \log \frac{\left[\mathrm{Cu}^{2+}\right]}{\left[\mathrm{Zn}^{2+}\right]}$

Metallic conductance involves movement of electrons where as electrolytic conductance involves movement of ions. Specific conductance increases with increase in concentration where as A m (molar conductivity) decreases with increase in concentration. Electrochemical cell converts chemical energy of redox reaction into electricity. Mercury cell, Dry cells are primary cells where as Ni-Cd cell, lead storage battery are secondary cells. Electroehemical series is arrangement of elements in increasing order of their reduction potential. Electrolytic cell converts electrical energy into chemical energy which is used in electrolysis. Amount of products formed are decided with the help of Faraday's laws of Electrolysis. Kohlrausch law helps to determine limiting molar conductivity of weak electrolyte, their degree of ionisation ( $\alpha$ ) and their dissociation constants. Corrosion is electrochemical phenomenon. Metal undergoing corrosion acts as anode, loses electrons to form ions which combine with substances present in atmosphere to form surface compounds. More reactive metals are coated over less reactive metals to prevent corrosions. H 2 -O 2 fuel cell was used in apollo space programme. (a) Out of 0.5 M, 0.01 M, 0.1 M and 1.0 M which solution of KCl will have highest value of specific conductance? Why? (b) Write the product of electrolysis of aq. NaCI on cathode. Why? (c) When does electrochemical cell behaves like electrolytic cell? (d) For an electrochemical cell Mg(s) + 2Ag + (aq) $\rightarrow$ 2Ag(s) + Mg 2+ . Give the cell representation and write Nernst equation. (e) Which will have higher conductance, silver wire at 30° or at 60°C? (f) Calculate maximum work obtained from the cell Ni(s) + 2Ag + (aq) $\rightarrow$ Ni 2+ (aq) + 2Ag(s) E o cell = 1.05V. (g) Which cell is used in hearing aids and watches?

Electrochemistry plays a very important part in our daily life. Primary cells like dry cell is used in torches, wall clock, mercury cell is used in hearing aids, watches. Secondary cells Ni-Cd cell is used in cordless phones, lithium battery is used in mobiles, lead storage battery is used in vehicle and inverter. Fuel cells like H 2 -O 2 cell was used in apollo space programme. A 38% solution of sulphuric and is used in lead storage battery. Its density is 1.30 g mL -1 . The battery holds 3.5 L of the acid. During the discharge of the battery, the density of H 2 SO 4 falls to 1.14 g mL -1 (20% solution by mass) (Molar mass of H 2 SO 4 is 98 g mol -1 ). (a) Write the chemical reaction taking place at anode when lead storage battery is in use. (b) How much electricity in Faraday is required to carry out the reduction of one mole of PbO 2 ? (c) What is molarity of sulphuric acid before discharge? (d) What is mass of sulphuric acid in solution after discharge? (e) Write the products of electrolysis when dilute sulphuric acid is electrolysed using platinum electrodes.

Observe the following table in which conductivity and molar conductivity of NaCI at 298 K at different concentration for different electrolytes is given. Answer the questions based in the table that follows: Conductivities and molar conductivities of NaCI at 298 K at different concentrations.

(a) What happens to conductivity on dilution and why? (b) Why is $\Lambda_{\mathrm{m}}^{\mathrm{o}}$ (limiting molar conductivity) for HCI more than NaCl? (c) Calculate degree of dissociation ( $\alpha$ ) of NaCI of 0.001 M concentration using the table. (d) Calculate $\Lambda_{\mathrm{m}}^{\mathrm{o}}$ of CH 3 COOH using the table. (e) Calculate Ka of 0.01 M CH 3 COOH solution if $\Lambda_{\mathrm{m}}^{\mathrm{o}}$ for CH 3 COOH is 390.07S cm 2 mol -1 , $\Lambda_{\mathrm{m}}$ = 39.07S cm -1 .

*****************************************

Previous Class 12th Chemsitry - Chemistry in Everyday Life Case Study Questions and Answe...
Next Class 12th Chemsitry - Polymers Case Study Questions and Answers 2022 - 2023

Reviews & Comments about Class 12th Chemsitry - Electrochemistry Case Study Questions and Answers 2022 - 2023

Write your Comment

12th Standard CBSE Chemistry Videos

CBSE 12th Chemistry Sample Model Question Paper with Answer Key 2023

12th Standard CBSE Chemistry Usefull Links

10th Standard

Other 12th Standard CBSE Subjects

Other 12th Standard CBSE Chemistry Study material

Class 12th chemsitry - chemistry in everyday ... click to view, class 12th chemsitry - polymers case study questions and answers 2022 - 2023 click to view, class 12th chemsitry - biomolecules case study questions and answers 2022 - 2023 click to view, class 12th chemsitry - amines case study questions and answers 2022 - 2023 click to view, class 12th chemsitry - aldehydes , ketones and ... click to view, class 12th chemsitry - alcohols , phenols and ... click to view, class 12th chemsitry - haloalkanes and haloarenes ... click to view, class 12th chemsitry - coordination compounds case ... click to view, class 12th chemsitry - the d- and ... click to view, class 12th chemsitry - the p-block elements ... click to view, class 12th chemsitry - general principles and ... click to view, class 12th chemsitry - surface chemistry case ... click to view, class 12th chemsitry - chemical kinetics case ... click to view, class 12th chemsitry - electrochemistry case study ... click to view, class 12th chemistry - solution case study questions and answers 2022 - 2023 click to view, register & get the solution for class 12th chemsitry - electrochemistry case study questions and answers 2022 - 2023.

No products in the cart.

Due to the festival holidays, please expect a delay in the Physical books order dispatch and delivery process.

Computer Science Olympiad (ICSO) Books
English Olympiad (IEO) Books
GK Olympiad (IGKO) Books
Maths Olympiad (IMO) Books
Science Olympiad (NSO) Books
Olympiads Combo Packs
SST Olympiad (ISSO) Books
Hindi Olympiad (IHO) Books
Maths Olympiad (IMO) Books – 9
Commerce Olympiad (ICO) Books
NEET Champion
NEET Previous Years Paper
NEET Sample Paper
NEET Crash Course
Online Tests
NCERT Fingertips
NEET Biology Books
NEET Physics Books
NEET Chemistry Books
Assertion & Reason
AIIMS Previous Years Paper
GK & Aptitude
JIPMER Previous Years Paper
JEE Main Guide
JEE PREVIOUS YEARS PAPER
JEE Sample Papers
JEE Crash Course
JEE Champion
JEE Mathematics Books
JEE Physics Books
JEE Chemistry Books
KCET Books – Karnataka CET
KEAM Books – Kerala Engineering Exam
WBJEE Books – West Bengal JEE
BITSAT Exam Books
MHT CET Books – Maharashtra CET
Live Classes
Recorded Classes
Monthly Magazine – Single Issue
Monthly Magazines – Subscription
Monthly Magazine: Older Volumes
Foundation Course Class 6
Foundation Course Class 7
Foundation Course Class 8
Foundation Course Class 9
Foundation Course Class 10
NCERT Solutions Class 6
NCERT Solutions Class 7
NCERT Solutions Class 8
NCERT Solutions Class 9
NCERT Solutions Class 10
NCERT Solutions Class 11
NCERT Solutions Class 12
CBSE Class 9 Books
CBSE Class 10 Reference Books
CBSE Class 10 Sample Paper Books
CBSE Class 10 Previous Year Solved Paper Books
CBSE Class 11 Books
CBSE Reference Books for Class 12
CBSE Previous Year Papers class 12 Books
CBSE Sample Papers for Class 12
Competitive Books
Olympiad Books
Govt. Exams
21 Science Crossword Puzzles
51 English Grammar Worksheets
IGKO Online Test Programme
Literature Books
Vedic Mathematics
Science Skill Development
Mathematics Skill Development
English Skill Development
Summer Programme Combo
Psychometric Online Test
General ebooks

Click on the image to zoom in

Read reviews (0)

Write a review

Score More Case Study Chapter wise Practice Questions Chemistry Class-12

₹ 125.00 ₹ 93.75 (25% Off)

Discount offer on this book in a bundle, click to view

ScoreMore Case Study Chapter-wise Practice Questions Chemistry Class-12 is curated with 800+ Chapter-wise MCQs related to Case study/ Passage based and Assertion & Reason with hints and explanations based on latest pattern of CBSE (2020-2021).

92 in stock

Your security guaranteed

Description
Table of content
Additional information
Reviews (0)

MTG ScoreMore Case Study Based Sample Questions Chemistry Class 12 is specially designed to help students get familiar with solving these new patterns of questions. The book covers 800 + sample questions for practice with detailed explanations to each question. Practising these questions will definitely help students to get an edge in their CBSE preparations.

For the academic year 2020-21 CBSE has incorporated more Objective type/MCQ based questions which will focus on measuring critical thinking ability of students.

The new pattern of questions includes Case study based questions, Passage based questions, Assertion and Reason type questions. In Case study based/ Passage based questions, students will be expected to answer questions after reading a given paragraph or a passage. Assertion and Reason type question is just another way of checking the clarity of one’s concept.

1. The Solid State
2. Solutions
3. Electrochemistry
4. Chemical Kinetics
5. Surface Chemistry
6. General Principles and Processes of Isolation of Elements*
7. The p-Block Elements
8. The d- and f-Block Elements
9. Coordination Compounds
10. Haloalkanes and Haloarenes
11. Alcohols, Phenols and Ethers
12. Aldehydes, Ketones and Carboxylic Acids
14. Biomolecules
15. Polymers*
16. Chemistry in Everyday Life*
*This chapter is not a part of the Board Examination 2020-21 syllabus

There are no reviews yet.

Your email address will not be published. Required fields are marked *

Your review *

Name *

Email *

Save my name, email, and website in this browser for the next time I comment.

Customers prefer to buy this combination offer...

Score More Case Study Chapter wise Practice Questions Combo-Phy,Chem, Bio,Maths Class-12

Total Price = ₹ 500.00

Combo Price = ₹ 375.00

Score More Case Study Chapter wise Practice Questions Biology Class-12

Score More Case Study Chapter wise Practice Questions Maths Class-12

Score More Case Study Chapter wise Practice Questions Physics Class-12

Notifications
Institutional Queries

Username or Email Address

Class Select Class Class 1 Class 2 Class 3 Class 4 Class 5 Class 6 Class 7 Class 8 Class 9 Class 10 Class 11 Class 12

Phone number

Class Select Class Class 1 Class 2 Class 3 Class 4 Class 5 Class 6 Class 7 Class 8 Class 9 Class 10 Class 11 Class 12 Others

Country * Afghanistan Åland Islands Albania Algeria American Samoa Andorra Angola Anguilla Antarctica Antigua and Barbuda Argentina Armenia Aruba Australia Austria Azerbaijan Bahamas Bahrain Bangladesh Barbados Belarus Belau Belgium Belize Benin Bermuda Bhutan Bolivia Bonaire, Saint Eustatius and Saba Bosnia and Herzegovina Botswana Bouvet Island Brazil British Indian Ocean Territory Brunei Bulgaria Burkina Faso Burundi Cambodia Cameroon Canada Cape Verde Cayman Islands Central African Republic Chad Chile China Christmas Island Cocos (Keeling) Islands Colombia Comoros Congo (Brazzaville) Congo (Kinshasa) Cook Islands Costa Rica Croatia Cuba Curaçao Cyprus Czech Republic Denmark Djibouti Dominica Dominican Republic Ecuador Egypt El Salvador Equatorial Guinea Eritrea Estonia Eswatini Ethiopia Falkland Islands Faroe Islands Fiji Finland France French Guiana French Polynesia French Southern Territories Gabon Gambia Georgia Germany Ghana Gibraltar Greece Greenland Grenada Guadeloupe Guam Guatemala Guernsey Guinea Guinea-Bissau Guyana Haiti Heard Island and McDonald Islands Honduras Hong Kong Hungary Iceland India Indonesia Iran Iraq Ireland Isle of Man Israel Italy Ivory Coast Jamaica Japan Jersey Jordan Kazakhstan Kenya Kiribati Kuwait Kyrgyzstan Laos Latvia Lebanon Lesotho Liberia Libya Liechtenstein Lithuania Luxembourg Macao Madagascar Malawi Malaysia Maldives Mali Malta Marshall Islands Martinique Mauritania Mauritius Mayotte Mexico Micronesia Moldova Monaco Mongolia Montenegro Montserrat Morocco Mozambique Myanmar Namibia Nauru Nepal Netherlands New Caledonia New Zealand Nicaragua Niger Nigeria Niue Norfolk Island North Korea North Macedonia Northern Mariana Islands Norway Oman Pakistan Palestinian Territory Panama Papua New Guinea Paraguay Peru Philippines Pitcairn Poland Portugal Puerto Rico Qatar Reunion Romania Russia Rwanda São Tomé and Príncipe Saint Barthélemy Saint Helena Saint Kitts and Nevis Saint Lucia Saint Martin (Dutch part) Saint Martin (French part) Saint Pierre and Miquelon Saint Vincent and the Grenadines Samoa San Marino Saudi Arabia Senegal Serbia Seychelles Sierra Leone Singapore Slovakia Slovenia Solomon Islands Somalia South Africa South Georgia/Sandwich Islands South Korea South Sudan Spain Sri Lanka Sudan Suriname Svalbard and Jan Mayen Sweden Switzerland Syria Taiwan Tajikistan Tanzania Thailand Timor-Leste Togo Tokelau Tonga Trinidad and Tobago Tunisia Turkey Turkmenistan Turks and Caicos Islands Tuvalu Uganda Ukraine United Arab Emirates United Kingdom (UK) United States (US) United States (US) Minor Outlying Islands Uruguay Uzbekistan Vanuatu Vatican Venezuela Vietnam Virgin Islands (British) Virgin Islands (US) Wallis and Futuna Western Sahara Yemen Zambia Zimbabwe

Mobile number *

Email address *

Password *

Lost your password? Please enter your username or email address. You will receive a link to create a new password via email.

Username or email

Reset password

Just remembered? Log In Instead

Don’t have an account? Register with us

Case Based Questions Test: Electrochemistry - NEET MCQ

15 questions mcq test - case based questions test: electrochemistry, read the passage given below and answer the following questions: the cell constant is usually determined by measuring the resistance of the cell containing a solution whose conductivity is already known. for this purpose, we generally use kcl solutions whose conductivity is known accurately at various concentrations and at different temperatures. consider the resistance of a conductivity cell filled with 0.1 m kcl solution is 200 ohm. if the resistance of the same cell when filled with 0.02 m kcl solution is 420 ohm. (conductivity of 0.1 m kcl solution is 1.29 s m –1 .) the following questions are multiple choice questions. choose the most appropriate answer: q. what is the conductivity of 0.02 m kcl solution.

A. 0.452 S m –1
B. 0.215 S m –1
C. 0.614 S m –1
D. 0.433 S m –1

= 0.614Sm -1

Read the passage given below and answer the following questions: The cell constant is usually determined by measuring the resistance of the cell containing a solution whose conductivity is already known. For this purpose, we generally use KCl solutions whose conductivity is known accurately at various concentrations and at different temperatures. Consider the resistance of a conductivity cell filled with 0.1 M KCl solution is 200 Ohm. If the resistance of the same cell when filled with 0.02 M KCl solution is 420 Ohm. (Conductivity of 0.1 M KCl solution is 1.29 S m –1 .) The following questions are Multiple Choice Questions. Choose the most appropriate answer: Q. The cell constant of a conductivity cell ________.

A. Changes with change of electrolyte.
B. Changes with change of concentration of electrolyte
C. Changes with temperature of electrolyte.
D. Remains constant for a cell.

Read the passage given below and answer the following questions: The cell constant is usually determined by measuring the resistance of the cell containing a solution whose conductivity is already known. For this purpose, we generally use KCl solutions whose conductivity is known accurately at various concentrations and at different temperatures. Consider the resistance of a conductivity cell filled with 0.1 M KCl solution is 200 Ohm. If the resistance of the same cell when filled with 0.02 M KCl solution is 420 Ohm. (Conductivity of 0.1 M KCl solution is 1.29 S m –1 .) The following questions are Multiple Choice Questions. Choose the most appropriate answer: Q. What will happen to the conductivity of the cell with the dilution?

A. First decreases then increases
B. Increases
C. First increases then decreases
D. Decreases

Read the passage given below and answer the following questions:

The cell constant is usually determined by measuring the resistance of the cell containing a solution whose conductivity is already known. For this purpose, we generally use KCl solutions whose conductivity is known accurately at various concentrations and at different temperatures. Consider the resistance of a conductivity cell filled with 0.1 M KCl solution is 200 Ohm. If the resistance of the same cell when filled with 0.02 M KCl solution is 420 Ohm. (Conductivity of 0.1 M KCl solution is 1.29 S m –1 .)

The following questions are Multiple Choice Questions. Choose the most appropriate answer:

Q. SI unit for conductivity of a solution is

B. S m 2 mol –1
C. mol cm –3
D. S cm 2 mol –1

A galvanic cell consists of a metallic zinc plate immersed in 0.1 M Zn(NO 3 ) 2 solution and metallic plate of lead in 0.02 M Pb(NO 3 ) 2 solution.

The following questions are multiple choice questions.

Choose the most appropriate answer:

Q. How will the cell be represented ?

A. Zn(s)| Zn 2+ (aq)|| Pb 2+ (aq)|Pb(s)
B. Zn 2+ (s)| Zn(aq)|| Pb 2+ (aq)|Pb(s)
C. Pb 2+ (aq)|Pb(s)||Zn 2+ (s)| Zn(aq)
D. Pb(s)|Pb 2+ (aq)||Zn 2+ (s)| Zn(aq)

According to Nernst equation

Q. What product is obtained at cathode?

Cathode reaction: Pb 2+ (aq) + 2e – → Pb(s)

Q. Which of the following statements is not correct about an inert electrode in a cell ?

A. It does not participate in the cell reaction.
B. It provides surface either for oxidation or for reduction reaction.
C. It provides surface for conduction of electrons.
D. It provides a surface for redox reaction.

Products of electrolysis depend on the nature of material being electrolysed and the type of electrodes being used. If the electrode is inert (e.g., platinum or gold), it does not participate in the chemical reaction and acts only as source or sink for electrons. On the other hand, if the electrode is reactive, it participates in the electrode reaction. Thus, the products of electrolysis may be different for reactive and inert electrodes. Aqueous copper sulphate solution and aqueous silver nitrate solution are electrolysed by 1 ampere current for 10 minutes in separate electrolytic cells.

In these questions, a statement of assertion followed by a statement of reason. Choose the correct answer out of the following choices.

Assertion (A): The mass of copper and silver, deposited on the cathode be same.

Reason (R): Copper and silver have different equivalent masses.

A. Assertion and reason both are correct statements and reason is correct explanation for assertion.
B. Assertion and reason both are correct statements but reason is not correct explanation for assertion.
C. Assertion is correct statement but reason is wrong statement.
D. Assertion is wrong statement but reason is correct statement.

It will be different for silver since the equivalent weight of silver is different.

Assertion (A): At equilibrium condition E cell = 0 or Δ r G = 0.

Reason (R): E cell is zero when both electrodes of the cell are of the same metal.

C. Assertion is a correct statement but reason is wrong statement.

Assertion (A): In a galvanic cell, chemical energy is converted into electrical energy.

Reason (R): Redox reactions provide the chemical energy to the cell.

Assertion (A): The negative sign in the expression E Zn 2+/ Zn = – 0.76V means Zn 2+ cannot be oxidised to Zn.

Reason (R): Zn is more reactive than hydrogen & Zn will oxidised, & H + will get reduced.

All chemical reactions involve interaction of atoms and molecules. A large number of atoms/molecules are present in a few gram of any chemical compound varying with their atomic/molecular masses. To handle such large number conveniently, the mole concept was introduced. All electrochemical cell reactions are also based on mole concept. For example, a 4.0 molar aqueous solution of NaCl is prepared and 500 mL of this solution is electrolysed. This leads to the evolution of chlorine gas at one of the electrode. The amount of products formed can be calculated by using mole concept.

The following questions are multiple choice questions. Choose the most appropriate answer:

Q. The total number of moles of chlorine gas evolved is

Q. If cathode is a Hg electrode, then the maximum weight of amalgam formed from this solution is

2 moles of amalgam = 23 x 2 + 2 x 200

All chemical reactions involve interaction of atoms and molecules. A large number of atoms/molecules are present in a few grams of any chemical compound varying with their atomic/molecular masses. To handle such large numbers conveniently, the mole concept was introduced. All electrochemical cell reactions are also based on mole concept. For example, a 4.0 molar aqueous solution of NaCl is prepared and 500 mL of this solution is electrolysed. This leads to the evolution of chlorine gas at one of the electrode. The amount of products formed can be calculated by using mole concept.

Q. In electrolysis of NaCl when Pt electrode is taken then H 2 is liberated at cathode while with Hg cathode it forms sodium amalgam :-

A. Hg is more inert than Pt
B. More voltage is required to reduce H + at Hg than at Pt
C. Na is dissolved in Hg while it does not dissolve in Pt
D. Conc, of H + ions is larger when Pt electrode is taken

Conc of H+ ions is larger when the Pt electrode is taken. Hence, H+ ions are discharged in preference to Na+ ions. When Hg cathode is used Na+ ions are discharged.

Top Courses for NEET

Important Questions for Case Based Questions Test: Electrochemistry

Case based questions test: electrochemistry mcqs with answers, online tests for case based questions test: electrochemistry, welcome back, create your account for free.

Forgot Password

school Campus Bookshelves
menu_book Bookshelves
perm_media Learning Objects
login Login
how_to_reg Request Instructor Account
hub Instructor Commons
Download Page (PDF)
Download Full Book (PDF)
Periodic Table
Physics Constants
Scientific Calculator
Reference & Cite
Tools expand_more
Readability

selected template will load here

This action is not available.

Case Study: Fuel Cells

Last updated
Save as PDF
Page ID 253

Fuels cells generate electricity from an electrochemical reaction in which oxygen and a fuel combine to form water. Fuel cells work by converting the chemical energy found in the fuel, e.g. hydrogen gas, into electrical energy (electricity).

Introduction

In a fuel cell, the fuel is oxidized at the anode which yields electrons that flow through an external circuit doing electrical work, before an oxidant (often oxygen) is reduced by these electrons at the cathode.

\[O_{2(g)} + \underset{\text{Fuel}}{H_{2(g)}} \rightarrow 2H_2O_{(l)} \nonumber \]

The resulting electricity can be used in a variety of ways, including: powering motor vehicles, electrical devices, and airplanes. Fuel cells also produce heat as a by-product which is finding increasing use in heating homes, especially in Japan. With its multifunctional products and by-products, fuel cells are rapidly becoming the hot ticket alternative source of energy as we move into a greener and more progressive era.

What is happening inside a hydrogen fuel cell?

A hydrogen fuel cell enables hydrogen to be combined electrochemically with oxygen to produce electricity, water, and heat. One fuel cell alone only produces a small amount of power. However, grouping the individual fuel cells together creates a fuel cell stack (as shown below in the diagram). When delivered to a fuel cell engine, fuel cell stacks create enough energy to power buses and other vehicles, and have even been used to power spacecraft.

Each fuel cell in the stack contains two electrodes - a positive cathode (where the reduction occurs) and a negative anode (where the oxidation occurs). The energy-producing reactions take place at the surfaces of the electrodes. Each individual pair of electrodes is separated by an electrolyte (either in solid or liquid form). This electrolyte carries electrically charged particles (ions) between the electrodes. The rate of a given reaction can be increased with the help of a catalyst such as platinum or nickel.

The power ($P$) produced by a fuel cell is equal to the voltage ($V$) multiplied by the current ($I$) at which it is being operated. This is measured in watts (W).

\[P= IV \nonumber \]

Factors That Reduce Efficiency in Fuel Cells

There are a number of factors that reduce the efficiency in fuel cells, which can be broadly categorized as reversible, irreversible and fuel utilization losses.

'Reversible' losses correspond to losses that underpin the deviation between the standard electrode potential of the full electrochemical cell and the actual operating open-circuit voltage (OCV).

'Irreversible' losses describe the various contributions from different components of the fuel cell to the loss of voltage with respect to OCV, as the current drawn from the cell/stack is increased. This includes an activation barrier that must be overcome at low currents, which can represent a loss of ~200 mV. This results from the reactions requiring energy to overcome a threshold before occurring, despite a thermodynamic driving force. This is especially relevant in the case of the reduction of oxygen at the cathode. Further losses are experienced in the intermediate regime as a result of ohmic resistance (both ionic and electronic) and due to mass transport limitations at high current loads.

Particularly in the case of PEMFCs, the flows of waste water and unspent fuel occur at rates that exceed the capabilities of the fuel cell's physical capabilities and not all fuel that enters at the inlet is utilized. This also results in a drop of overall efficiency.

Since the efficiency of a fuel cell is directly proportional to the power generated, its efficiency is almost proportional to its voltage.

Different Types of Fuel Cells

Alkaline Fuel Cells (AFC): AFC's use alkaline electrolytes like potassium hydroxide. Generally, a solution of potassium hydroxide in water is used as the electrolyte. The cell operates at 150-200 degrees Celsius, and can generate anywhere from 300 W to 5 MW. AFC's were first used in the Apollo Space Missions by NASA.
Molten Carbonate Fuel Cells (MCFC): MCFC's use molten carbonate salts as their electrolyte. This fuel cell has a high electrical efficiency of 60 %. These cells operate at about 600 degrees Celsius. The generated power varies, and some units have been built with outputs as high as 100 MW. Because of the high temperatures, these cells are not generally used in the home.
Zinc Air Fuel Cells (ZAFC): In this type of fuel cell, there is a gas diffusion electrode, a zinc anode separated by electrolyte and a mechanical separator. Oxygen is reduced to hydroxide, which combines with oxidized zinc, generating electrons in the process.
Phosphoric Acid Fuel Cells (PAFC): This fuel cell's anode and cathode are made with specks of platinum on a carbon and silicon carbide matrix that supports the phosphoric acid electrolyte. PAFC's are commonly used in large commercial vehicles i.e. buses and were the first fuel cells to be commercialized.
Proton Exchange Membrane Fuel Cells (PEMFC): This fuel cell uses a polymeric membrane as the electrolyte along with platinum-activated, carbon-based electrodes. PEMFC's can function at relatively low temperatures and are therefore commonly used in scenarios requiring short start-up times, including transport and portable applications.
Direct Methanol Fuel Cells (DMFC): This fuel cell is similar to the Proton Exchange Membrane Fuel Cell; however, instead of using gaseous hydrogen as the fuel, liquid methanol is used.
Solid Oxide Fuel Cells (SOFC): SOFC's can operate from ~ 550 °C to 1000 °C. SOFC's are able to do so because they use a solid ceramic electrolyte between their electrodes. Like MCFC's, SOFC's can also perform at an efficiency of around 60 %. These fuel cells are often used for generating heat and electricity in industry and for providing auxiliary power in motor vehicles.

Types of Fuel Cells Comparison Chart IK.png

The Benefits of Fuel Cell Power

Fuel cells create little to no environmentally damaging emissions: generally, the only byproduct in a hydrogen fuel cell, typically found in automobiles, is water.

As long as fuel is always available, the fuel cell can run for an infinite amount of time.
Fuel cells offer cleaner, quieter, and more efficient power production than conventional internal combustion engines.
Fuel cells can use a variety of fuels, such as: natural gas, methanol, gasoline, and hydrogen. Fuel cells are becoming increasingly reliable, with some systems demonstrating very low degradation rates.

Where are Fuel Cells Being Used Now?

Fuel cells are being used all over the globe. Here are some examples:

NASA was the first to use fuel cells commercially in the 60's. In fact alkaline fuel cells have flown over 100 missions and been used for over 80,000 hours for NASA.
The US Navy has used fuel cells in submarines since the 80's.
Backed by the European Union, Clean Urban Transportation for Europe , "CUTE", fuel cell buses have been successfully implemented in various European cities.
As part of its national project to create a fossil fuel free economy, Iceland , has begun to convert its fishing fleet from diesel engines to hydrogen fuel cells.
Fuel cells are also being designed to be able to power smaller electronics such as cellular phones, laptop computers, and also for use as an auxiliary power source. Portable mobile phone chargers are now commercially available.
Many major car manufacturers all over the world have already created various prototypes of fuel cell powered automobiles.

Outside links

Online Encyclopedia Article: en.Wikipedia.org/wiki/Fuel_cell
Video Of How It Works: www.youtube.com/watch?v=esuAlB4NVi0
The Chemistry: www.princeton.edu/~chm333/200...hemistry.shtml
The History: www.princeton.edu/~chm333/200...-history.shtml
Petrucci, Ralph H. General Chemistry: Principles and Modern Applications 9th Ed. New Jersey: Pearson Education Inc. 2007.
Koppel, Tom. Powering the Future : The Ballard Fuel Cell and the Race to Change the World . New York: John Wiley & Sons, Incorporated, 1999.
Solid Oxide Fuel Cell (SOFC)
Proton Exchange Membrane Fuel Cell (PEMFC)
Molten Carbonate Fuel Cell (MCFC)
Alkaline Fuel Cell (AFC)
Phosphoric Acid Fuel Cell (PAFC)
Name one byproduct of an active hydrogen fuel cell.
What company/organization was the first to commercialize fuel cells?
What role does an electrolyte play in a fuel cell?
Name one way in which fuel cells are beneficial to society.

1. Answer: A) Solid Oxide Fuel Cell (SOFC)

Explanation: As explained by the table in the 'Different Types of Fuel Cells' section, the Solid Oxide Fuel Cell (SOFC) is the most efficient with an efficiency of 50-65%.

2. Answer: Water OR Heat

Explanation: Both water and heat are by-products of an active hydrogen fuel cell.

3. Answer: United Technologies Corporation

Explanation: United Technologies Corporation was the first company to commercialize fuel cells.

4. Answer: It serves as a bridge between anode and cathode.

Explanation: An electrolyte serves a bridge that connects the anode and cathode parts of a fuel cell. This is because of the ionic nature of salts in solution. As a voltage is applied, these ions align either at the cathode or at the anode according to their charge. This creates a bridge that the voltage can cross.

5. Answer: No (very little) carbon-dioxide emissions OR Very high efficiency

Explanation: The very efficient nature of fuel cells relative to standard combustion engines and other similar devices is highly valued in today's society because of the rising cost of energy. The relatively low emissions produced by fuel cells is also beneficial to the environment.

Andhra Pradesh
Chhattisgarh
West Bengal
Madhya Pradesh
Maharashtra
Jammu & Kashmir
NCERT Books 2022-23
NCERT Solutions
NCERT Notes
NCERT Exemplar Books
NCERT Exemplar Solution
States UT Book
School Kits & Lab Manual
NCERT Books 2021-22
NCERT Books 2020-21
NCERT Book 2019-2020
NCERT Book 2015-2016
RD Sharma Solution
TS Grewal Solution
DK Goel Solution
TR Jain Solution
Selina Solution
Frank Solution
ML Aggarwal Solution
Lakhmir Singh and Manjit Kaur Solution
I.E.Irodov solutions
ICSE - Goyal Brothers Park
ICSE - Dorothy M. Noronhe
Sandeep Garg Textbook Solution
Micheal Vaz Solution
S.S. Krotov Solution
Evergreen Science
KC Sinha Solution
ICSE - ISC Jayanti Sengupta, Oxford
ICSE Focus on History
ICSE GeoGraphy Voyage
ICSE Hindi Solution
ICSE Treasure Trove Solution
Thomas & Finney Solution
SL Loney Solution
SB Mathur Solution
P Bahadur Solution
Narendra Awasthi Solution
MS Chauhan Solution
LA Sena Solution
Integral Calculus Amit Agarwal Solution
IA Maron Solution
Hall & Knight Solution
Errorless Solution
Pradeep's KL Gogia Solution
OP Tandon Solutions
Sample Papers
Previous Year Question Paper
Value Based Questions
CBSE Syllabus
CBSE MCQs PDF
Assertion & Reason
New Revision Notes
Revision Notes
HOTS Question
Marks Wise Question
Toppers Answer Sheets
Exam Paper Aalysis
Concept Map
CBSE Text Book
Additional Practice Questions
Vocational Book
CBSE - Concept
KVS NCERT CBSE Worksheets
Formula Class Wise
Formula Chapter Wise
JEE Crash Course
JEE Previous Year Paper
Important Info
JEE Mock Test
JEE Sample Papers
SRM-JEEE Mock Test
VITEEE Mock Test
BITSAT Mock Test
Manipal Engineering Mock Test
AP EAMCET Previous Year Paper
COMEDK Previous Year Paper
GUJCET Previous Year Paper
KCET Previous Year Paper
KEAM Previous Year Paper
Manipal Previous Year Paper
MHT CET Previous Year Paper
WBJEE Previous Year Paper
AMU Previous Year Paper
TS EAMCET Previous Year Paper
SRM-JEEE Previous Year Paper
VITEEE Previous Year Paper
BITSAT Previous Year Paper
UPSEE Previous Year Paper
CGPET Previous Year Paper
CUSAT Previous Year Paper
AEEE Previous Year Paper
Crash Course
Previous Year Paper
NCERT Based Short Notes
NCERT Based Tests
NEET Sample Paper
Previous Year Papers
Quantitative Aptitude
Numerical Aptitude Data Interpretation
General Knowledge
Mathematics
Agriculture
Accountancy
Business Studies
Political science
Enviromental Studies
Mass Media Communication
Teaching Aptitude
NAVODAYA VIDYALAYA
SAINIK SCHOOL (AISSEE)
Mechanical Engineering
Electrical Engineering
Electronics & Communication Engineering
Civil Engineering
Computer Science Engineering
CBSE Board News
Scholarship Olympiad
School Admissions
Entrance Exams
All Board Updates
Miscellaneous
State Wise Books
Engineering Exam

SHARING IS CARING If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

LPU University Admissions 2023 upto 100% Scholarship (All Pages)

NCERT Solutions for Class 12 Maths
NCERT Solutions for Class 10 Maths
CBSE Syllabus 2023-24
Social Media Channels
Login Customize Your Notification Preferences
Solid State 14 April, 2021, 6:33 pm
Solutions 14 April, 2021, 6:33 pm
Electrochemistry 14 April, 2021, 6:33 pm
Chemical Kinetics 14 April, 2021, 6:33 pm
Surface Chemistry 14 April, 2021, 6:33 pm
p-Block Elements 14 April, 2021, 6:33 pm
d- and f-Block Elements 14 April, 2021, 6:33 pm
Coordination Compounds 14 April, 2021, 6:33 pm
Haloalkanes And Haloarenes 14 April, 2021, 6:33 pm

Second click on the toggle icon

Provide prime members with unlimited access to all study materials in PDF format.

Allow prime members to attempt MCQ tests multiple times to enhance their learning and understanding.

Provide prime users with access to exclusive PDF study materials that are not available to regular users.

Work & Careers
Life & Arts
Currently reading: Business school teaching case study: can green hydrogen’s potential be realised?
Business school teaching case study: how electric vehicles pose tricky trade dilemmas
Business school teaching case study: is private equity responsible for child labour violations?

Business school teaching case study: can green hydrogen’s potential be realised?

Close-up of a green and white sign featuring the chemical symbol for hydrogen, ‘H2’

Business school teaching case study: can green hydrogen’s potential be realised? on x (opens in a new window)
Business school teaching case study: can green hydrogen’s potential be realised? on facebook (opens in a new window)
Business school teaching case study: can green hydrogen’s potential be realised? on linkedin (opens in a new window)
Business school teaching case study: can green hydrogen’s potential be realised? on whatsapp (opens in a new window)

Jennifer Howard-Grenville and Ujjwal Pandey

Roula Khalaf, Editor of the FT, selects her favourite stories in this weekly newsletter.

Hydrogen is often hyped as the “Swiss army knife” of the energy transition because of its potential versatility in decarbonising fossil fuel-intensive energy production and industries. Making use of that versatility, however, will require hydrogen producers and distributors to cut costs, manage technology risks, and obtain support from policymakers.

To cut carbon dioxide emissions, hydrogen production must shift from its current reliance on fossil fuels. The most common method yields “grey hydrogen”, made from natural gas but without emissions capture. “Blue hydrogen,” which is also made from natural gas but with the associated carbon emissions captured and stored, is favourable.

But “green hydrogen” uses renewable energy sources, including wind and solar, to split water into hydrogen and oxygen via electrolysis. And, because there are no carbon emissions during production or combustion, green hydrogen can help to decarbonise energy generation as well as industry sectors — such as steel, chemicals and transport — that rely heavily on fossil fuels.

Ultimately, though, the promise of green hydrogen will hinge on how businesses and policymakers weigh several questions, trade-offs, and potential long-term consequences. We know from previous innovations that progress can be far from straightforward.

Wind power, for example, is a mature renewable energy technology and a key enabler in green hydrogen production, but it suffers vulnerabilities on several fronts. Even Denmark’s Ørsted — the world’s largest developer of offshore wind power and a beacon for renewable energy — recently said it was struggling to deliver new offshore wind projects profitably in the UK.

Generally, the challenge arises from interdependencies between macroeconomic conditions — such as energy costs and interest rates — and business decision-making around investments. In the case of Ørsted, it said the escalating costs of turbines, labour, and financing have exceeded the inflation-linked fixed price for electricity set by regulators.

Business leaders will also need to steer through uncertainties — such as market demand, technological risks, regulatory ambiguity, and investment risks — as they seek to incorporate green hydrogen.

Test yourself

This is the third in a series of monthly business school-style teaching case studies devoted to responsible-business dilemmas faced by organisations. Read the piece and FT articles suggested at the end before considering the questions raised.

About the authors: Jennifer Howard-Grenville is Diageo professor of organisation studies at Cambridge Judge Business School; Ujjwal Pandey is an MBA candidate at Cambridge Judge and a former consultant at McKinsey.

The series forms part of a wide-ranging collection of FT ‘instant teaching case studies ’ that explore business challenges.

Two factors could help business leaders gain more clarity.

The first factor will be where, and how quickly, costs fall and enable the necessary increase to large-scale production. For instance, the cost of the electrolysers needed to split water into hydrogen and oxygen remains high because levels of production are too low. These costs and slow progress in expanding the availability and affordability of renewable energy sources have made green hydrogen much more expensive than grey hydrogen, so far — currently, two to three times the cost.

The FT’s Lex column calculated last year that a net zero energy system would create global demand for hydrogen of 500mn tonnes, annually, by 2050 — which would require an investment of $20tn. However, only $29bn had been committed by potential investors, Lex noted, despite some 1,000 new projects being announced globally and estimated to require total investment of $320bn.

A worker in a cleanroom suit inspects a large flexible solar panel in a high-tech manufacturing setting, with the panel’s reflection visible on a shiny surface below

Solar power faced similar challenges a decade ago. Thanks to low-cost manufacturing in China and supportive government policies, the sector has grown and is, within a very few years , expected to surpass gas-fired power plant installed capacity, globally. Green hydrogen requires a similar concerted effort. With the right policies and technological improvements, the cost of green hydrogen could fall below the cost of grey hydrogen in the next decade, enabling widespread adoption of the former.

Countries around the world are introducing new and varied incentives to address this gap between the expected demand and supply of green hydrogen. In Canada, for instance, Belgium’s Tree Energy Solutions plans to build a $4bn plant in Quebec, to produce synthetic natural gas from green hydrogen and captured carbon, attracted partly by a C$17.7bn ($12.8bn) tax credit and the availability of hydropower.

Such moves sound like good news for champions of green hydrogen, but companies still need to manage the short-term risks from potential policy and energy price swings. The US Inflation Reduction Act, which offers tax credits of up to $3 per kilogramme for producing low-carbon hydrogen, has already brought in limits , and may not survive a change of government.

Against such a backdrop, how should companies such as Hystar — a Norwegian maker of electrolysers already looking to expand capacity from 50 megawatts to 4 gigawatts a year in Europe — decide where and when to open a North American production facility?

The second factor that will shape hydrogen’s future is how and where it is adopted across different industries. Will it be central to the energy sector, where it can be used to produce synthetic fuels, or to help store the energy generated by intermittent renewables, such as wind and solar? Or will it find its best use in hard-to-abate sectors — so-called because cutting their fossil fuel use, and their CO₂ emissions, is difficult — such as aviation and steelmaking?

Steel producers are already seeking to pivot to hydrogen, both as an energy source and to replace the use of coal in reducing iron ore. In a bold development in Sweden, H2 Green Steel says it plans to decarbonise by incorporating hydrogen in both these ways, targeting 2.5mn tonnes of green steel production annually .

Meanwhile, the global aviation industry is exploring the use of hydrogen to replace petroleum-based aviation fuels and in fuel cell technologies that transform hydrogen into electricity. In January 2023, for instance, Anglo-US start-up ZeroAvia conducted a successful test flight of a hydrogen fuel cell-powered aircraft.

A propeller-driven aircraft with the inscription ‘ZEROAVIA’ is seen ascending above a grassy airfield with buildings and trees in the background

The path to widespread adoption, and the transformation required for hydrogen’s range of potential applications, will rely heavily on who invests, where and how. Backers have to be willing to pay a higher initial price to secure and build a green hydrogen supply in the early phases of their investment.

It will also depend on how other technologies evolve. No industry is looking only to green hydrogen to achieve their decarbonisation aims. Other, more mature technologies — such as battery storage for renewable energy — may instead dominate, leaving green hydrogen to fulfil niche applications that can bear high costs.

As with any transition, there will be unintended consequences. Natural resources (sun, wind, hydropower) and other assets (storage, distribution, shipping) that support the green hydrogen economy are unevenly distributed around the globe. There will be new exporters — countries with abundant renewables in the form of sun, wind or hydropower, such as Australia or some African countries — and new importers, such as Germany, with existing industry that relies on hydrogen but has relatively low levels of renewable energy sourced domestically.

How will the associated social and environmental costs be borne, and how will the economic and development benefits be shared? Tackling climate change through decarbonisation is urgent and essential, but there are also trade-offs and long-term consequences to the choices made today.

Questions for discussion

Lex in depth: the staggering cost of a green hydrogen economy

How Germany’s steelmakers plan to go green

Hydrogen-electric aircraft start-up secures UK Infrastructure Bank backing

Aviation start-ups test potential of green hydrogen

Consider these questions:

Are the trajectories for cost/scale-up of other renewable energy technologies (eg solar, wind) applicable to green hydrogen? Are there features of the current economic, policy, and business landscape that point to certain directions for green hydrogen’s development and application?

Take the perspective of someone from a key industry that is part of, or will be affected by, the development of green hydrogen. How should you think about the technology and business opportunities and risks in the near term, and longer term? How might you retain flexibility while still participating in these key shifts?

Solving one problem often creates or obscures new ones. For example, many technologies that decarbonise (such as electric vehicles) have other impacts (such as heavy reliance on certain minerals and materials). How should those participating in the emerging green hydrogen economy anticipate, and address, potential environmental and social impacts? Can we learn from energy transitions of the past?

Climate Capital

Where climate change meets business, markets and politics. Explore the FT’s coverage here .

Are you curious about the FT’s environmental sustainability commitments? Find out more about our science-based targets here

Promoted Content

Explore the series.

A Smart EQ Fortwo electric vehicle charges at a Belib’ station alongside a locked bicycle in Paris, France

Follow the topics in this article

Carbon footprint Add to myFT
Climate change Add to myFT
Renewable energy Add to myFT
Environment Add to myFT
Business school Add to myFT

International Edition

Search form

Academic Advising & Support
Academic Planning & Resources
Environmental Changemakers Certificate
Academic Opportunities & Research
Financial Support
Online Forms & Resources
Calendar & Deadlines
Career Resources
Clubs and Organizations
Frequently Asked Questions
Advisors & Coordinators
Graduate Studies Committee
Curricular Practical Training
New Graduate Students
Ph.D. Milestones
Policies & Procedures
Teaching Assistant FAQs
Career Development Resources
Engineering Student Study/Meeting Space
Free Software
Message From Chair
Facts & Figures
Undergraduate
Faculty & Staff
Academic Employment
Dept Events
Discovery News
Student Testimonials
Give to BME
Seminar Series
E-Newsletter
Message from Chair
CEE Affiliates
Give to CEE
International Center Form
MSE Business & Forms
MSE 298 Seminars
MSE Diversity & Inclusion
Support MSE@UCI
MAE Seminars
Corporate Affiliates
Interdisciplinary Graduate Programs
All faculty & staff
Dean's Office
Development and External Relations
Student Affairs
Engineering Research Management
UC Irvine Directory
Proposal Text and Resources
Early Career Opportunities
Purchasing Requests
Reimbursements
Purchasing & Reimbursement Mission Statement
Business Meetings/ Entertainment Guidelines
Service Agreements
Travel Guidelines
Travel Tips
UC Policies & Procedures
Dean's Executive Office
Chief Administrative Officers
Personnel Unit
Finance Unit
Purchasing Unit
Computing Unit
Facilities Unit
Curriculum, Analytical Studies, & Accreditation (CASA)
Communications Office
Development and External Relations Office
Outreach Unit
Office of Information Technology
Faculty Websites
Computer Labs & Laptops
Engineering Facilities Request Form
Safety Procedures
Campus Evacuation Zones
Environmental Health & Safety
UCI Police Department
Helpful Links
At Your Service
Zot! Portal
FAQs for Engineering Instructors
Spring Awards
Process Improvement
Alumni Spotlight
Hall of Fame
#ANTEATERENGINEER
Ways to Give
UCI Engineering Alumni Society
UC Irvine Alumni Association
Dean's Message
Strategic Plan
Facts and Figures
Henry Samueli
School Leadership
Engineering Leadership Council
Accreditation
Orange County
Got Questions?
Enrollment and Degrees Awarded
How to Apply
Prospective Students
Newly Admitted
Majors and Minors Offered
Programs and Concentrations
Accelerated Status Program
International Fellowships
Meet Us on the Road
Anteater Voices
Ph.D. and Master's Inquiry Form
Message from the Associate Dean
UCI Engineering-LANL Graduate Fellowships
Research Thrusts
Research by Department
Research Centers, Institutes and Facilities
Undergraduate Research
Interdisciplinary Science and Engineering Building (ISEB)
Contracts & Grants / ERM
Research and Proposal Development
Annual Membership Levels
Connect with Students
Prototyping Services
Sponsored Research
External Relations Office
Community College
International
IDEA - Inclusion, Diversity, Equity, Access
Stacey Nicholas Office of Access and Inclusion
Inclusion in Engineering Education
Samueli Shoutouts
Media Watch
Dean's Report
Social Media
Style Guide

MSE Special Seminar: Decarbonizing Industries for a Climate-resilient Future - From Renewable Energy to Sustainable Material Recovery

Abstract: Long-term decarbonization within the power sector and the materials manufacturing sector stands as the most urgent challenge of our era. Without decisive action, carbon emissions associated with these sectors are set to more than double by 2050. The rapid expansion of affordable renewable electricity presents unprecedented opportunities to revolutionize conventional engineering processes through electrochemistry, thus providing solutions to our society’s grand challenges. Hence, innovations in these sectors capable of reducing or eliminating CO2 generation will be pivotal in changing our current climate trajectory. In this talk, I will discuss two of my previous experiences exploring and applying foundational principles in electrochemistry, mechanical engineering and materials science to advance applications in energy storage and materials sustainability. First, I will present different approaches to electrolyte design for stabilizing metal electrodeposition processes at the interfaces in electrochemical cells, with practical applications in metal anode batteries. Then, I will introduce my work on a closed-loop materials recovery platform utilizing electrochemically mediated techniques, which can separate waste into valuable product streams without additional waste generation, relying solely on low-cost electricity, water and table salt. In the future, my research will delve deeper into fundamental mechanisms and pioneer technologies aimed at accelerating the transition to a low-carbon and climate-resilient future.

Bio: Duhan Zhang is dedicated to addressing pressing challenges at the intersection of energy, climate and sustainability. Currently, Duhan is a postdoctoral associate, working with Yet-Ming Chiang at the Massachusetts Institute of Technology in the Department of Materials Science and Engineering, distinguished by an MIT Energy Initiative Fellowship. She earned a Ph.D. in mechanical engineering from Cornell University, working with Lynden Archer, supported by the Telluride Association Fellowship. Her doctoral research focused on optimizing the stability of metal electrodeposition in energy storage systems by manipulating electrolyte properties. Her present work delves into energy materials, electrochemical energy storage and conversion systems, and electrification of materials recovery and manufacturing processes. Throughout her academic journey, Duhan has received multiple recognitions for her research and contributions, including the Mars Fellowship from the Lindau Nobel Laureate Meetings and the best paper award from the Joint Center for Energy Storage Research, among others. With a commitment to innovation and sustainability, she continues to push the boundaries of scientific inquiry for a brighter, greener future.

News & Events

SUGGESTED TOPICS
The Magazine
Newsletters
Managing Yourself
Managing Teams
Work-life Balance
The Big Idea
Data & Visuals
Reading Lists
Case Selections
HBR Learning
Topic Feeds
Account Settings
Email Preferences

Share Podcast

How to Make Tough Decisions as a Manager

There’s no formula for the difficult moments managers face, but there are questions you should consider.

Apple Podcasts
Google Podcasts

Imagine you’re a new manager, and one of your team members consistently underperforms. But there’s a catch: your struggling employee is a personal friend of your CEO. When performance review time rolls around, should you be honest and give them a low rating?

There are no simple answers for the tough decisions that managers face. Harvard Business School professor Joe Badaracco says that hard and fast rules only go so far in these sorts of situations. Instead, managers must use their best judgement to find a solution.

Badaracco is a business ethics expert and the author of the book, Managing in the Gray: Five Timeless Questions for Resolving Your Toughest Problems at Work .

In this episode, he explains how to approach what he calls “gray-area decisions.” First, gather as much information as you can, taking different perspectives into account. Then, consider the consequences of the different possible actions you can take, the values of your organization, and your own personal values.

Key episode topics include: leadership, managing conflicts, dismissing employees, managing people, managing employees, tough calls,

HBR On Leadership curates the best case studies and conversations with the world’s top business and management experts, to help you unlock the best in those around you. New episodes every week.

Listen to the original Cold Call episode: Managing in the Real World: How to Make Gray-Area Decisions (2016)
Find more episodes of Cold Call
Discover 100 years of Harvard Business Review articles, case studies, podcasts, and more at HBR.org .

HANNAH BATES: Welcome to HBR on Leadership, case studies and conversations with the world’s top business and management experts – hand-selected to help you unlock the best in those around you.

Imagine you’re a new manager and one of your team members consistently underperforms, but there’s a catch. Your struggling employee is a personal friend of your boss. When performance review time rolls around, should you be honest and give them a low rating or should you avoid conflict and give them the same rating they’ve been receiving for years? There are no simple answers to the tough decisions that managers face. Harvard Business School Professor Joe Badaracco says that in these sorts of situations, hard and fast rules only go so far. Instead, managers must do the more difficult thing. Use their best judgment to find a solution. In this episode, Badaracco explains how managers can approach what he calls gray area decisions. First, gather as much information as you can and take different perspectives into account. Then consider the consequences of different possible actions, the values of your organization and your own personal values. If you’re a new manager facing a tough dilemma, this episode is for you. It originally aired on Cold Call in November 2016. Here it is.

BRIAN KENNY: You’re fired. These are two words no one ever wants to hear, and with the exception of reality TV, it’s not usually how the message is delivered nowadays. Today, in an effort to be fair, most organizations have a process that involves personal improvement plans, mentoring and monitoring, even counseling, before taking such a drastic step of severing employment. Yet still the decision to fire an employee is rarely clear cut. And for the person being transitioned, quotations, the rationality used by their manager for that decision is most assuredly questionable. So, what exactly does or should go on in the mind of a manager deciding the fate of an employee? Today we’ll hear from Professor JOE BADARACCO about his case entitled “Two Tough Calls.” I’m your host, Brian Kenny, and you’re listening to Cold Call .

SPEAKER 3: So, we’re all sitting there in the classroom.

SPEAKER 4: Professor walks in.

SPEAKER 5: And they look up and you know what’s coming. Oh, the dreaded Cold Call .

BRIAN KENNY: Joe Badaracco is the John Shad Professor of Business Ethics at Harvard Business School. His research focuses on what counts as sound reflection for busy men and women who have serious responsibilities and face hard practical problems. He’s the author of many cases, articles and books on the topic, including the recently published Managing in the Gray. Joe, thanks for joining me.

JOE BADARACCO: Glad to be here, Brian.

BRIAN KENNY: So, I really enjoyed reading this case and reading parts of the book, and I think many people, anybody who’s managed a team, can relate to the challenge that you’re going to talk about in this case. But maybe you could start just by setting the case up for us. Who’s the protagonist and what’s going on?

JOE BADARACCO: Sure. The case is an unusual case, it’s written in the first person, so you’ve got to give the protagonist a name. So, let’s call her Susan. But you’re really hearing Susan’s voice and you’re hearing Susan tell her story. So, she was a computer science graduate, this is her first job, full-time job. She’d had a couple internships at Microsoft. She was a very talented programmer.

She also had a lot of management potential, so she was spotted early as somebody who could move up pretty quickly at this online retailer. She got two promotions pretty fast. She found herself managing a team of 14 people. Some of them were about her age. They were techies like her. Some of them were older than her, and some of them were not performing anywhere near the standard she expected. And it came time for her to give reviews, and she wanted to give reviews to several people that would’ve basically triggered lots of problems. I’ll talk in particular about a guy named Terry. So he had been brought into the company because he was a scuba diving pal of some of the executives.

BRIAN KENNY: Oh, we’ve all encountered a Terry.

JOE BADARACCO: And from Susan’s point of view, he was basically contributing nothing to the team. She’d worked with him, she’d tried to find some things for him to do, but her view was his contribution was basically zero. Now, under the performance evaluation system, it was one to five, and he’d been getting 3.5 for a number of years, and that was fine.

BRIAN KENNY: Pretty good.

JOE BADARACCO: But she thought he deserved a 2.5. In this company, 2.5 meant that you were basically on a greased shoot out the company. It was accompanied what’s called a PIP, a performance improvement plan, which a lot of companies have. But this was really a tripwire. And once you were on a PIP, as soon as you came in late or something like that, you got a box and you were out. So she wanted to give him what he deserved, the 2.5. She floated this idea among the people she worked for, and they said, you’re kind of young in the job, you’ve been doing well so far. Why make some waves? Are you sure you’ve got enough experience to judge him? Doesn’t he deserve another chance, given that he’s had threes and three point fives?

BRIAN KENNY: And he’s a good scuba diver.

JOE BADARACCO: Apparently an excellent scuba diver. Yeah.

BRIAN KENNY: Let me stop you there.

JOE BADARACCO: Sure.

BRIAN KENNY: Because I want to want to pull the reins back in a little bit, and I guess one of the things that I’m curious about is why you decided to write this case, why you chose to write it in the way you did?

JOE BADARACCO: Well, after the incidents described in the case, the young woman came here to HBS to get an MBA. So I had her as a student. And I don’t recall how we got to talking about this case possibility, but it seemed really promising, because as you pointed out, many of our MBA students have already been in positions where they’ve had to let somebody go. Many of them in the last few years have had family members that have been fired or laid off, and some of them will actually admit in class that they personally have been laid off. So it’s a very real subject. And this was somebody who’s a contemporary of our MBA students facing one of these tough calls.

BRIAN KENNY: Tell me a little bit more about Susie. Is that what we’re calling her?

JOE BADARACCO: Yeah, Susie, Susan. Sure.

BRIAN KENNY: So, is she a millennial? Does that factor into this?

JOE BADARACCO: Well, I think she was kind of a millennial, but I think she was basically herself and she prided herself on being very direct to the point of being blunt. She thought that in organizations, people were rarely treated honestly, that there were lots of games played that people told you you were doing well when you weren’t doing so well and so forth. She said she was going to be blunt, she wanted people to be blunt with her.

She was also, as I mentioned, younger than some of the people she was managing, and some of the people she was considering letting go. And as you sort of read her first-person narrative in the case, some students sort of like her, they see her as a practitioner of what’s called sort of extreme transparency. And others say, this is kind of a arrogant, aggressive individual who’s a little bit too full of herself. And then what’s interesting in class is some students, often women will say, you wouldn’t say the same thing about a male protagonist in this situation. So that’s another issue that comes up in the case.

BRIAN KENNY: Yeah, you talk about her technical proficiency, which has given her some affinity with the technical team, which is pretty important. It allows her maybe to get things done a little faster because she kind of understands what she’s asking people to do. So, she’s a AA, hard-working type person, and she makes her hiring decisions pretty specifically based on her own personality type.

JOE BADARACCO: Exactly. She wants people who she said, come out of college hungry. They love to have goals, they’re willing to work 80 hours a week, and she is too. And she says to them, “Look, all you need to do to be successful here is to tell me what I need to do to help you be successful and complete the mission that our team has.” So, it’s a complicated picture. In many ways, there are things that are admirable about her, but there’s other things that kind of put people off.

BRIAN KENNY: So, what are some of the things as a manager that Susan needs to think about? I mean, it doesn’t seem like she’s in a place where she can just sever that relationship and have Terry move along. There’s a process that she has to go through both intellectually as well as managerially.

JOE BADARACCO: Yeah. Well, let me mention, first of all, what’s the central idea in my book that’s just come out. And it can be summarized essentially in a single sentence, and it says, “When you face one of these difficult decisions, a gray area decision, first of all, you want to work through it as a manager.” That means you get the best information. You can look at things in a couple different ways. If there’s expert judgment, in this case HR that can be brought to bear, talk to the senior people, which she did. You get the best information and judgments you can. That’s what it means to work through it as a manager.

But then in the end, it’s a judgment call and you’ve got to approach it as a human being. You’re going to make that call, you’re going to live with the consequences. And so it’s in that context that some of the questions in the book are really quite relevant, and these questions, by the way, aren’t mine. They’re not Harvard Business School’s. Basically, they come from a multi-year effort to try to look at how great thinkers over the millennia have advised us to look at really hard problems. So you look hard at the consequences, full consequences as objectively as you can. You think about what you believe your core human duties are. So what does she owe Terry? What does she owe the people on her team? You think about the values of your organization. You think clearly about what you can live with. Because you will live with it, and you’re also going to be held accountable in your organization.

A lot of people think if you’ve got one of these difficult decisions, you just trust your judgment, you trust your gut. You look at your moral compass. And what I really emphasize in the book is, the first thing you’ve got to do is the best analysis you can as a manager, okay? If you can use big data analytics, whatever it is, wring everything you can out of what you can learn. Then you make a judgment as a human being. But again, that’s not gut feel. That’s after you think through consequences, your duties, what’ll work. It’s only at the very end that you finally trust your judgment after it’s been tempered and shaped and guided by the preliminary steps.

BRIAN KENNY: You mentioned before the obligation that Susan as a manager has to Terry. Does Terry have an obligation back to Susan to do the job well? Does that make the whole decision much-

JOE BADARACCO: He certainly had an obligation to the company and the team to pull his oar, and he wasn’t doing it.

BRIAN KENNY: And part of my question was sort of what’s at the core of it too, is that I mentioned in the introduction how most organizations have sort of an extreme set of processes that one needs to go through. Have companies gone too far in trying to make sure that they’re giving every opportunity for the employee to perform?

JOE BADARACCO: I think that’s a tough one. I don’t have any basis for generalizing on that. At the end of the day, even when there are elaborate systems and lots of steps and checklists, a lot comes down to the judgment of managers. When do you start putting notes in a file about someone’s performance? Certainly you need to inform them if they’re on thin ice or if they’re about to go on probation. What do you tell them? How candidly do you inform them? How helpful are you? A lot of these things come down to one-on-one judgment calls, sort of the character and experience of the person who’s making the decision.

BRIAN KENNY: In the book, you talk about this concept of moral imagination. So can you describe what that is and how it factors into these kinds of decisions?

JOE BADARACCO: Well, it has a lot to do with how you actually deliver the bad news and how you follow up after that. You’ve really got to put yourself as best you can in their shoes, as if you were the person being fired, or let’s say it was one of your kids or your parent, sibling, how would you want to be treated? That’s a way of bringing to the foreground a lot of these basic human considerations that can be lost if you’re simply angry at the person for not performing, or you’re just going through the company’s checklist on how to process people out.

BRIAN KENNY: You’ve discussed this case in class before?

JOE BADARACCO: Many times.

BRIAN KENNY: So, I don’t want you to give away too much, but what kind of reactions do you get?

JOE BADARACCO: Well, first, students really do engage in this. I’m talking here about MBA students. They either have been or expect soon to be in situations like this. Secondly, they have, as I mentioned earlier, a variety of responses to Susan, so that pulls them further into the case. Some of them make very sound comments, and I think one worth thinking about is this, it says, look, you’re managing a team, you’ve got a company, whatever. Should you really expect that everybody on that team is going to be an A player, or after coaching from you is going to be an A player? The point they make is that good managers learn to work with… They want As, they have some Bs, they live with some Cs. And that’s what managing in the real world is like. So there’s a really good set of discussions about not just what she should do, but whether she should do anything.

BRIAN KENNY: Joe, thank you so much for joining me.

JOE BADARACCO: You’re welcome, Brian.

HANNAH BATES: That was Harvard Business School professor Joe Badaracco in conversation with Brian Kenny on Cold Call . He’s also the author of the book, Managing in the Gray: Five Timeless Questions for Resolving Your Problems At Work .

We’ll be back next Wednesday with another hand-picked conversation about leadership from Harvard Business Review. If you found this episode helpful, share it with your friends and colleagues, and follow our show on Apple Podcasts, Spotify, or wherever you get your podcasts. While you’re there, be sure to leave us a review. When you’re ready for more podcasts, articles, case studies, books and videos with the world’s top business and management experts, find it all at HBR.org.

This episode was produced by Anne Saini, and me, Hannah Bates. Ian Fox is our editor. Music by Coma Media. Special thanks to Maureen Hoch, Erica Truxler, Ramsey Khabbaz, Nicole Smith, Anne Bartholomew, and you, our listener. See you next week.

Subscribe On:

Latest in this series

This article is about leadership.

Managing employees
Managing people
Managing conflicts
Dismissing employees

Partner Center

A popular YouTuber's negative video of Humane's AI Pin raises questions about critical reviews in the age of innovation

This post originally appeared in the Insider Today newsletter.
You can sign up for Business Insider's daily newsletter here .

Hello there! If you're struggling to decide the foods worth buying organic, best-selling author Michael Pollan has some suggestions for the ones worth splurging on to avoid harmful chemicals .

In today's big story, we're looking at a critical tech review that caused a bit of a stir on social media .

What's on deck:

Markets: Goldman Sachs quiets the haters with a monster earnings report .

Tech: Leaked docs show one of Prime Video's biggest issues, forcing customers to abandon shows .

Business: The best bet in business these days? Targeting young men who like to gamble .

But first, the review is in!

If this was forwarded to you, sign up here.

The big story

Up for review.

"The Worst Product I've Ever Reviewed… For Now"

Marques Brownlee, the YouTuber better known as MKBHD, didn't mince words with the title of his review of Humane's AI Pin .

In a 25-minute video , Brownlee details all the issues he encountered using the AI device. (Spoiler alert: There were a lot.)

Brownlee's review aligns with other criticisms of the device . But not all of those came from someone with as much sway. His YouTube channel has more than 18 million subscribers.

One user on X pointed that out , calling the review "almost unethical" for "potentially killing someone else's nascent project" in a post reposted over 2,000 times.

Most of the internet disagreed, and a Humane exec even thanked Brownlee on X for the "fair and valid critiques."

But it highlights the power of Brownlee's reviews. Earlier this year, a negative video of Fisker's Ocean SUV by Brownlee also made waves on social media .

Critical reviews in the age of innovation raise some interesting questions.

To be clear, there was nothing wrong with Brownlee's review. Humane's AI Pin costs $700. Watering down his review to ease the blow would be a disservice to the millions of fans relying on his perspective before making such a significant purchase.

Too often, companies view potential customers as an extension of their research and development. They are happy to sell a product that is still a work in progress on the promise they'll fix it on the fly. ("Updates are coming!")

But in a world of instant gratification, it can be hard to appreciate that innovation takes time.

Even Apple can run into this conundrum. Take the Apple Vision Pro. Reviewers are impressed with the technology behind the much-anticipated gadget — but are still struggling to figure out what they can do with it . Maybe, over time, that will get sorted out. It's also worth remembering how cool tech can be, as Business Insider's Peter Kafka wrote following a bunch of trips in Waymo's software-powered taxis in San Francisco . Sure, robotaxis have their issues, Peter said, but they also elicit that "golly-gee-can-you-believe-it" sense.

As for Humane, America loves a comeback story. Just look at "Cyberpunk 2077." The highly anticipated video game had a disastrous launch in 2020 , but redeemed itself three years later, ultimately winning a major award .

Still, Humane shouldn't get a pass for releasing a product that didn't seem ready for primetime, according to the reviews.

And its issue could be bigger than glitchy tech. Humane's broader thesis about reducing screen time might not be as applicable. As BI's Katie Notopolous put it: " I love staring at my iPhone ."

3 things in markets

1. Goldman finally strikes gold. After a rough stretch, the vaunted investment bank crushed earnings expectations , sending its stock soaring. A big tailwind, according to CEO David Solomon, is AI spawning " enormous opportunities " for the bank.

2. Buy the dip, Wedbush says. Last week's drop among tech stocks shouldn't scare away investors , according to Wedbush. A strong earnings report, buoyed by the ongoing AI craze, should keep them soaring, strategists said. But JPMorgan doesn't see it that way, saying prices are already stretched .

3. China's economy beat analysts' expectations. The country's GDP grew 5.3% in the first quarter of 2024, according to data published by the National Bureau of Statistics on Tuesday. It's a welcome return to form for the world's second-largest economy, although below-par new home and retail sales remain a cause for concern .

3 things in tech

1. Amazon Prime Video viewers are giving up on its shows. Leaked documents show viewers are fed up with the streamer's error-ridden catalog system , which often has incomplete titles and missing episodes. In 2021, 60% of all content-related complaints were about Prime Video's catalog.

2. Eric Newcomer is bringing his Cerebral Valley AI Summit to New York. The conference, originally held in San Francisco, is famous for producing one of the largest generative AI acquisitions ever. Now, it's coming to New York in June .

3. OpenAI is plotting an expansion to NYC. Two people familiar with the plans told BI that the ChatGPT developer is looking to open a New York office next year. That would be the company's fifth office, alongside its current headquarters in San Francisco, a just-opened site in Tokyo, and spots in London and Dublin.

3 things in business

1. America's young men are spending their money like never before. From sports betting to meme coins, young men are more willing than ever to blow money in the hopes of making a fortune .

2. Investors are getting into women's sports. With women like Caitlin Clark dominating March Madness headlines, investors see a big opportunity. BI compiled a list of 13 investors and fund managers pouring money into the next big thing in sports.

3. Bad news for Live Nation. The Wall Street Journal reports that the Justice Department could hit the concert giant with an antitrust lawsuit as soon as next month. Live Nation, which owns Ticketmaster, has long faced criticism over its high fees.

In other news

Blackstone hires Walmart AI whiz to supercharge its portfolio companies .

Taylor Swift, Rihanna, Blackpink's Lisa: Celebrities spotted at Coachella 2024 .

NYC's rat czar says stop feeding the pigeons if you want the vermin gone .

A major Tesla executive left after 18 years at the company amid mass layoffs .

Some Tesla factory workers realized they were laid off when security scanned their badges and sent them back on shuttles, sources say .

New York is in, San Francisco is very much out for tech workers relocating .

AI could split workers into 2: The ones whose jobs get better and the ones who lose them completely .

Oh look at that! Now Google is using AI to answer search queries .

A longtime banker gives a rare inside look at how he is thinking about his next career move, from compensation to WFH .

Clarence Thomas didn't show up for work today .

What's happening today

Today's earnings: United Airlines, Bank of America, Morgan Stanley, and others are reporting .

It's Free Cone Day at participating Ben & Jerry's stores.

The Insider Today team: Dan DeFrancesco , deputy editor and anchor, in New York. Jordan Parker Erb , editor, in New York. Hallam Bullock , senior editor, in London. George Glover , reporter, in London.

Watch: Nearly 50,000 tech workers have been laid off — but there's a hack to avoid layoffs

Main content

IMAGES

SOLUTION: Case based passage based integrated questions
12 Chemistry Chapter 3
Question and answer on electrochemistry.pdf
SOLUTION: Electrochemistry questions with answers
SOLUTION: Electrochemistry questions with answers
21. Electrochemistry Questions and Answers

VIDEO

A2 Chemistry: past paper question Discussion of Electrochemistry and Redox Equilibria (part -1)
practice questions of electrochemistry # class 12th# neet aspirant # motivational video
Electrochemical Reactions_Lesson_Electrolytic Cells
Electrolysis Exercise 2 Question 1 to 5 Cambridge IGCSE O level Chemistry 0620/0971/5070 Lesson 38e
ElectroChemistry Practice Problems
Electrochemistry: Important Topics For Jkbose || Class12 Chemistry chapter 2 Important Topics

COMMENTS

CBSE 12th Chemistry Electrochemistry Case Study Questions With Solution
The following questions are multiple choice questions. Choose the most appropriate answer. (i) At infinite dilution, the equivalent conductance of CaSO 4 is. (a) 256 x 10-4. (b) 279. (c) 23.7. (d) 2.0 x 10- 8. (ii) If the degree of dissociation of CaSO 4 solution is 10% then equivalent conductance of CaSO 4 is.
Case Study Questions for Class 12 Chemistry Chapter 3 Electrochemistry
There is Case Study Questions in class 12 Chemistry in session 2020-21. For the first time, the board has introduced the case study questions in the board exam. The first two questions in the board exam question paper will be based on Case Study and Assertion & Reason. The first question will have 5 MCQs … Continue reading Case Study Questions for Class 12 Chemistry Chapter 3 Electrochemistry
Class 12 Chemistry Case Study Questions PDF Download
We have provided here Case Study questions for the Class 12 Chemistry Final Board exams. You can read these chapter-wise Case Study questions. ... Electrochemistry: 18: 9: 3: Chemical Kinetics: 15: 7: 4: d -and f -Block Elements: 18: 7: 5: Coordination Compounds: 18: 7: 6: Haloalkanes and Haloarenes: 15: 6: 7: Alcohols, Phenols and Ethers: 14: ...
Case Study: Battery Types
A dry-cell battery is a battery with a paste electrolyte (as opposed to a wet-cell battery with a liquid electrolyte) in the the middle of its cylinder and attached are metal electrodes. A dry-cell battery is a primary cell that cannot be reused. In order to function, each dry-cell battery has a cathode and an anode.
Case Study on Electrochemistry Class 12 Chemistry PDF
The PDF file of the Electrochemistry Case Study for Class 12 Chemistry with Solutions is a very important study resource that can help students better prepare for the exam and boost conceptual learning. The solutions are in the hint manner as well as contain full examples too, refer to the link to access the Case Study on Electrochemistry Class ...
PDF Case Study Based Questions Electrochemistry Xii Science
Case Il : Read the passage given below and answer the following questions from 58 to 62. The electrochemical cell shown below is concentration cell. M I M2+ (saturated solution of a sparingly soluble The emf of the cell depends on the difference in concentrations ofM2 • ions at the two electrodes.
Case Study Questions for Class 12 Chemistry Chapter 3 Electrochemistry
Important Questions, MCQ's, NCERT Solutions - Class 12 Chemistry . Get here all the Important questions for Class 12 Chemistry chapter wise as free PDF download. Here you will get Extra Important Questions with answers, Numericals and Multiple Choice Questions (MCQ's) chapter wise in Printable format. Solving Chapter wise questions is one of the best ways to prepare for the examination.
Electrochemistry
Electrochemistry Basics. Electrochemistry is the study of chemical processes that cause electrons to move. This movement of electrons is called electricity, which can be generated by movements of electrons from one element to another in a reaction known as an oxidation-reduction ("redox") reaction.
Electrochemistry questions (practice)
Choose 1 answer: (Choice A) At equilibrium, E c e l l. ‍. calculates to a value of 0 and the battery is considered dead because Q becomes K e q. ‍. and K e q. ‍. has a value of 0.
Case Study: Industrial Electrolysis
Case Study: Industrial Electrolysis. Page ID. Electrolysis reactions are the basic foundations of today's modern industry. There are various elements, chemical compounds, and organic compounds that are only produced by electrolysis including aluminum, chlorine, and NaOH. Electrolysis is the process by which an electric current spurs an ...
CBSE 12th Standard Chemistry Subject Electrochemistry Chapter Case
QB365 Provides the updated CASE Study Questions for Class 12 , and also provide the detail solution for each and every case study questions . Case study questions are latest updated question pattern from NCERT, QB365 will helps to get more marks in Exams - Complete list of 12th Standard CBSE question papers, syllabus, exam tips, study material, previous year exam question papers, centum tips ...
CBSE Class 12 Chemistry Case Study Questions PDF
This will help them to understand the type of Case Study questions that can be asked in Grade 12 Chemistry examinations. Our expert faculty for standard 12 Chemistry have designed these questions based on the trend of questions that have been asked in last year's exams. The solutions have been designed in a manner to help the grade 12 ...
Electrochemistry
Using reduction potentials. Standard reduction potentials. Voltage as an intensive property. Spontaneity and redox reactions. Free energy and cell potential. Worked example: Constructing a galvanic cell using reduction potential values. Worked example: Identifying the best oxidising agent using Eo (red.) values.
CBSE Class 12 Chemistry Case Study : Questions With Solutions
Class 12 Chemistry Case Study Questions for Term 1 exam includes The Solid State, The P block elements, Haloalkanes and Haloarenes, Biomolecules, etc. Questions for all these chapters are given in the PDF file that are available here for free to download. Term 1 exam is about to be held in November-December this year.
case study questions on electrochemistry Archives
Tag: case study questions on electrochemistry. Join our Telegram Channel for Free PDF Download. Join Now! March 17, 2021 August 6, 2021 Physics Gurukul 1 Comment on Case Study Questions for Class 12 Chemistry Chapter 3 Electrochemistry.
Important Questions for Class 12 Chemistry Chapter 3
Solution: (a) Both assertion and reason are true and the reason is correct explanation for assertion. 4. Assertion : Λ m for weak electrolytes shows a sharp increase when the electrolytic solution is diluted. Reason : For weak electrolytes degree of dissociation increases with dilution of solution.
Class 12th Chemsitry
Class 12th Chemsitry - Electrochemistry Case Study Questions and Answers 2022 - 2023 - Complete list of 12th Standard CBSE question papers, syllabus, exam tips, study material, previous year exam question papers, centum tips, formula, answer keys, solutions etc..
Score More Case Study Chapter wise Practice Questions Chemistry Class
Discount offer on this book in a bundle, click to view. ScoreMore Case Study Chapter-wise Practice Questions Chemistry Class-12 is curated with 800+ Chapter-wise MCQs related to Case study/ Passage based and Assertion & Reason with hints and explanations based on latest pattern of CBSE (2020-2021). See Complete Description of Product. Qty: -. +.
Case Based Questions Test: Electrochemistry
The following questions are multiple choice questions. Choose the most appropriate answer: Q. The total number of moles of chlorine gas evolved is. A. 0.5. B. 1.0. C. 1.5. D. 1.9. Detailed Solution for Case Based Questions Test: Electrochemistry - Question 13.
Case Study: Fuel Cells
Fuel cells offer cleaner, quieter, and more efficient power production than conventional internal combustion engines. Fuel cells can use a variety of fuels, such as: natural gas, methanol, gasoline, and hydrogen. Fuel cells are becoming increasingly reliable, with some systems demonstrating very low degradation rates.
PDF Autonomous closed-loop mechanistic investigation of molecular
knowledge and literature in electrochemistry. The entire platform can be conveniently installed in a glovebox (Fig. 1b, c) to ensure compat-ibility with oxygen- and moisture-sensitive chemistry. As an initial case study, we deployed an autonomous closed-loop workﬂow to investigate the oxidative addition of RX electrophiles to
Case Study on Electrochemistry Class 12 Chemistry PDF
Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now. Case Study on Electrochemistry Class 12 Chemistry: Here, you will get Case Study Questions on Class 12 Electrochemistry PDF at free of cost. Along with you can also download Electrochemistry case study questions for Class ...
Business school teaching case study: can green hydrogen's potential be
Ultimately, though, the promise of green hydrogen will hinge on how businesses and policymakers weigh several questions, trade-offs, and potential long-term consequences. We know from previous ...
Case Study: Treating and Managing a Pediatric Uvular Cyst
Case Study: Treating and Managing a Pediatric Uvular Cyst. Prompt surgery was necessary when symptoms drastically increased. An 18-month-old patient presented with persistent ear infections but did not have any noticeable upper airway or oral symptoms. The patient was originally seen by W. Kyle Mudd, DO, a pediatrician at Cleveland Clinic, who ...
MSE Special Seminar: Decarbonizing Industries for a Climate-resilient
Without decisive action, carbon emissions associated with these sectors are set to more than double by 2050. The rapid expansion of affordable renewable electricity presents unprecedented opportunities to revolutionize conventional engineering processes through electrochemistry, thus providing solutions to our society's grand challenges.
How to Make Tough Decisions as a Manager
In this episode, he explains how to approach what he calls "gray-area decisions.". First, gather as much information as you can, taking different perspectives into account. Then, consider the ...
MKBHD Review of Humane AI Is a Case Study of Criticism of Innovation
For Now". Marques Brownlee, the YouTuber better known as MKBHD, didn't mince words with the title of his review of Humane's AI Pin. In a 25-minute video, Brownlee details all the issues he ...

Class 12 Chemistry Case Study Questions PDF Download

Case Study-Based Questions for Class 12 Chemistry

Importance of Class 12 Chemistry Case Study-Based Questions

Tips to Excel in Class 12 Chemistry Case Study Questions

Best Books for Class 12 Chemistry

Chemistry Syllabus for 2024

FAQ on Class 12 Chemistry Case Study Questions

Q: How often should I practice Class 12 Chemistry Case Study Based Questions?

Q: Can I discuss case study questions with my teachers?

You Might Also Like

The Topper Combo Flashcards

Not Able To Find Desired Paper or Worksheet SEARCH

Related Papers

Latest MCQ's and Important Questions for CBSE Class 12 Chemistry

Total Papers :

Question Bank of Other Subjects of Class 12

Question Bank of Other Classes

You can help other users

Rules and regulations for uploads

CBSE Schools

Top Schools

Other Schools

CBSE Papers

Paper Categories

CBSE Class 12 Chemistry Case Study Questions PDF

Class 12 Chemistry Case Study Questions

Chapter-wise Solved Case Study Questions for Class 12 Chemistry

Tips to Excel in CBSE Class 12 Chemistry Examinations

A. Regular Practice with Case Studies

B. Understanding Analytical Skills

C. Time Management Strategies

Best Books for Class 12 Chemistry

Benefits of Utilizing the CBSE Class 12 Chemistry Case Study PDF

What is the CBSE Class 12 Chemistry case study PDF?

How does the case study PDF benefit students?

Are the case studies diverse in content?

Leave a Comment Cancel reply

Download India's best Exam Preparation App Now.

Unit 1: Electrochemistry

Standard cell potentials

Cell potentials at non standard conditions- Nernst Equation

Standard cell potential and equilibrium constant

Electrolytic cell and electrolysis

Quantitative aspect of electrolysis- Faraday's laws

Commercial cells

Tag: case study questions on electrochemistry

Case Study Questions for Class 12 Chemistry Chapter 3 Electrochemistry

Important Questions for Class 12 Chemistry Chapter 3 - Electrochemistry

Recommended Video

Class 12 Electrochemistry Important Questions with Answers

Matching Types Questions

Assertion-Reason Type Questions

Long Answer Types Questions

Leave a Comment Cancel reply

Register with BYJU'S & Download Free PDFs

12th Standard stateboard question papers & Study material

கணினி பயன்பாடுகள்

கணினி அறிவியல்

கணினி தொழில்நுட்பம்

கணக்குப்பதிவியல்

English Subjects

Computer Science

Business Maths and Statistics

Accountancy

Computer Applications

Computer Technology

11th Standard stateboard question papers & Study material

9th Standard stateboard question papers & Study material

Social Science

சமூக அறிவியல்

10th Standard stateboard question papers & Study material

7th Standard stateboard question papers & Study material

8th Standard stateboard question papers & Study material

கணிதம் - old

12th Standard CBSE Subject Question Paper & Study Material

Introductory Micro and Macroeconomics

Business Studies

Indian Society

Physical Education

Bio Technology