case study class 10 science cbse

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Case Study Class 10 Science Questions and Answers (Download PDF)

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Case Study Class 10 Science

If you are looking for the CBSE Case Study class 10 Science in PDF, then you are in the right place. CBSE 10th Class Case Study for the Science Subject is available here on this website. These Case studies can help the students to solve the different types of questions that are based on the case study or passage.

CBSE Board will be asking case study questions based on Science subjects in the upcoming board exams. Thus, it becomes an essential resource to study.

The Case Study Class 10 Science Questions cover a wide range of chapters from the subject. Students willing to score good marks in their board exams can use it to practice questions during the exam preparation. The questions are highly interactive and it allows students to use their thoughts and skills to solve the given Case study questions.

Download Class 10 Science Case Study Questions and Answers PDF (Passage Based)

Download links of class 10 Science Case Study questions and answers pdf is given on this website. Students can download them for free of cost because it is going to help them to practice a variety of questions from the exam perspective.

Case Study questions class 10 Science include all chapters wise questions. A few passages are given in the case study PDF of Science. Students can download them to read and solve the relevant questions that are given in the passage.

Students are advised to access Case Study questions class 10 Science CBSE chapter wise PDF and learn how to easily solve questions. For gaining the basic knowledge students can refer to the NCERT Class 10th Textbooks. After gaining the basic information students can easily solve the Case Study class 10 Science questions.

Case Study Questions Class 10 Science Chapter 1 Chemical Reactions & Equations

Case Study Questions Class 10 Science Chapter 2 Acids, Bases & Salts

Case Study Questions Class 10 Science Chapter 3 Metals & Non-metals

Case Study Questions Class 10 Science Chapter 4 Carbon & Its Compounds

Case Study Questions Class 10 Science Chapter 5 Periodic Classification of Elements

Case Study Questions Class 10 Science Chapter 6 Life Processes

Case Study Questions Class 10 Science Chapter 8 How Do Organisms Reproduce

Case Study Questions Class 10 Science Chapter 9 Heredity & Evolution

Case Study Questions Class 10 Science Chapter 10 Light-Reflection & Refraction

Case Study Questions Class 10 Science Chapter 11 The Human Eye & the Colourful World

Case Study Questions Class 10 Science Chapter 12 Electricity

Case Study Questions Class 10 Science Chapter 13 Magnetic Effects of Electric Current

Case Study Questions Class 10 Science Chapter 15 Our Environment

How to Solve Case Study Based Questions Class 10 Science?

In order to solve the Case Study Based Questions Class 10 Science students are needed to observe or analyse the given information or data. Students willing to solve Case Study Based Questions are required to read the passage carefully and then solve them.

While solving the class 10 Science Case Study questions, the ideal way is to highlight the key information or given data. Because, later it will ease them to write the final answers.

Case Study class 10 Science consists of 4 to 5 questions that should be answered in MCQ manner. While answering the MCQs of Case Study, students are required to read the paragraph as they can get some clue in between related to the topics discussed.

Also, before solving the Case study type questions it is ideal to use the CBSE Syllabus to brush up the previous learnings.

Features Of Class 10 Science Case Study Questions And Answers Pdf

Students referring to the Class 10 Science Case Study Questions And Answers Pdf from Selfstudys will find these features:-

Accurate answers of all the Case-based questions given in the PDF.
Case Study class 10 Science solutions are prepared by subject experts referring to the CBSE Syllabus of class 10.
Free to download in Portable Document Format (PDF) so that students can study without having access to the internet.

Benefits of Using CBSE Class 10 Science Case Study Questions and Answers

Since, CBSE Class 10 Science Case Study Questions and Answers are prepared by our Science experts referring to the CBSE Class 10 Science Syllabus , it provided benefits in various way:-

Case study class 10 Science helps in exam preparation since, CBSE Class 10 Question Papers contain case-based questions.
It allows students to utilise their learning to solve real life problems.
Solving case study questions class 10 Science helps students in developing their observation skills.
Those students who solve Case Study Class 10 Science on a regular basis become extremely good at answering normal formula based Science questions.
By using class 10 Science Case Study questions and answers pdf, students focus more on Selfstudys instead of wasting their valuable time.
With the help of given solutions students learn to solve all Case Study questions class 10 Science CBSE chapter wise pdf regardless of its difficulty level.

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Case Study Questions Class...

Case Study Questions Class 10 Science

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Download Case study questions for CBSE class 10 Science in PDF format from the myCBSEguide App . We have the new pattern case study-based questions for free download. Class 10 Science case study questions

This article will guide you through:

What are case study questions?

Sample Papers with Case Study questions
Class 10 Science Case Study question examples
How to get case-based questions for free?
How to attempt the case-based questions in Science?

Questions based on case studies are some real-life examples. The questions are asked based on a given paragraph i.e. Case Study. Usually, 4-5 questions are asked on the basis of the given passage. In most cases, these are either MCQs or assertion & reason type questions. Let’s take an example to understand. There is one paragraph on how nitrogen is generated in the atmosphere. On the basis of this paragraph, the board asks a few objective-type questions. In other words, it is very similar to the unseen passages given in language papers. But the real cases may be different. So, read this article till the end to understand it thoroughly.

What is CBE?

CBSE stands for competency-based education. The case study questions are part of this CBE. The purpose of CBE is to demonstrate the learning outcomes and attain proficiency in particular competencies.

Questions on Real-life Situations

As discussed the case study questions are based on real-life situations. Especially for grade 10 science, it is very essential to have the practical knowledge to solve such questions. Here on the myCBSEguide app, we have given many such case study paragraphs that are directly related to real-life implications of the knowledge.

Sample Papers with Case Study Questions

Class 10 Science Sample Papers with case study questions are available in the myCBSEguide App . There are 4 such questions (Q.No.17 to 20) in the CBSE model question paper. If you analyze the format, you will find that the MCQs are very easy to answer. So, we suggest you, read the given paragraph carefully and then start answering the questions. In some cases, you will find that the question is not asked directly from the passage but is based on the concept that is discussed there. That’s why it is very much important to understand the background of the case study paragraph.

CBSE Case Study Sample Papers

You can download CBSE case study sample papers from the myCBSEguide App or Student Dashboard. Here is the direct link to access it.

Case Study Question Bank

As we mentioned that case study questions are coming in your exams for the last few years. You can get them in all previous year question papers issued by CBSE for class 1o Science. Here is the direct link to get them too.

Class 10 Science Case Study Question Examples

As you have already gone through the four questions provided in the CBSE model question paper , we are proving you with other examples of the case-based questions in the CBSE class 10 Science. If you wish to get similar questions, you can download the myCBSEguide App and access the Sample question papers with case study-type questions.

Case-based Question -1

Read the following and answer any four questions: Salt of a strong acid and strong base is neutral with a pH value of 7. NaCl common salt is formed by a combination of hydrochloride and sodium hydroxide solution. This is the salt that is used in food. Some salt is called rock salt bed of rack salt was formed when seas of bygone ages dried up. The common salt thus obtained is an important raw material for various materials of daily use, such as sodium hydroxide, baking soda, washing soda, and bleaching powder.

Phosphoric acid
Carbonic acid
Hydrochloric acid
Sulphuric acid
Blue vitriol
Washing soda
Baking soda
Bleaching powder

Case-based Question -2

V 1 + V 2 + V 3
V 1 – V 2 +V 2
None of these
same at every point of the circuit
different at every point of the circuit
can not be determined
20 3 Ω 203Ω
15 2 Ω 152Ω

Case-based Question -3

pure strips
impure copper
refined copper
none of these
insoluble impurities
soluble impurities
impure metal
bottom of cathode
bottom of anode

How to Attempt the Case-Based Questions in Science?

Before answering this question, let’s read the text given in question number 17 of the CBSE Model Question Paper.

All living cells require energy for various activities. This energy is available by the breakdown of simple carbohydrates either using oxygen or without using oxygen.

See, there are only two sentences and CBSE is asking you 5 questions based on these two sentences. Now let’s check the first questions given there.

Energy in the case of higher plants and animals is obtained by a) Breathing b) Tissue respiration c) Organ respiration d) Digestion of food

Now let us know if you can relate the question to the paragraph directly. The two sentences are about energy and how it is obtained. But neither the question nor the options have any similar text in the paragraph.

So the conclusion is, in most cases, you will not get direct answers from the passage. You will get only an idea about the concept. If you know it, you can answer it but reading the paragraph even 100 times is not going to help you.

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CBSE Class 10 Science Case Study Questions Download Free PDF

If you are looking for the CBSE Class 10 Science Case Study Questions in PDF, then you are in the right place. CBSE 10th Class Case Study for the Science Subject is available here. These Case studies can help the students to solve the different types of questions that are based on the case study.

CBSE Board will be asking case study questions based on Science subjects in the upcoming board exams. Thus, it becomes an essential resource to study.

The Science Subject case study for class 10th covers a wide range of chapters from the Science. Students willing to score good marks in their board exams can use it. The questions are highly interactive and it allows students to use their thoughts and skills to solve such kinds of questions.

Case Study Questions Class 10 Science

In board exams, students will find the questions based on assertion and reasoning . Also, there will be a few questions based on case studies. In that, a paragraph will be given, and then the MCQ questions based on it will be asked.

Case Study Questions for Chapter 1 Chemical Reactions and Equations
Case Study Questions for Chapter 2 Acids, Bases, and Salts
Case Study Questions for Chapter 3 Metals and Non-Metals
Case Study Questions for Chapter 4 Carbon and Its Compounds
Case Study Questions for Chapter 5 Periodic Classification of elements
Case Study Questions for Chapter 6 Life Processes
Case Study Questions for Chapter 7 Control and Coordination
Case Study Questions for Chapter 8 How do organisms reproduce?
Case Study Questions for Chapter 9 Heredity and Evolution
Case Study Questions for Chapter 10 Light reflection and refraction
Case Study Questions for Chapter 11 Human eye and colorful world
Case Study Questions for Chapter 12 Electricity
Case Study Questions for Chapter 13 Magnetic effects of current
Case Study Questions for Chapter 15 Our Environment

The above Case studies for CBSE Class 10 Science will help you to score good marks in the Case Study questions that have been coming in your examinations. These CBSE Class 10 Science Case Study have been developed by experts of cbseexperts.com for benefit of Class 10 students.

Class 10 Science Assertion and Reason Questions

Case Study Type Questions in Science Class 10

Case Study Type Questions in Science Class 10 include the information or data. Students willing to solve them are required to read the passage carefully and then solve them. While solving the paragraph the ideal way is to highlight the key information or given data.

Because later it will ease them to write the final answers. Science Case study type questions consist of 4 to 5 questions that should be answered in an MCQ manner.

While reading the paragraph students will get the clue in between about the possible answer of the question. They should definitely highlight those questions. This is the best way to solve such kind of Case study Type Questions.

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CBSE 10th Standard Science Subject Case Study Questions

By QB365 on 21 May, 2021

QB365 Provides the updated CASE Study Questions for Class 10 , 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

QB365 - Question Bank Software

10th Standard CBSE

Final Semester - June 2015

Redox reactions are those reactions in which oxidation and reduction occur Simultaneously. A redox reaction is made up of two half reactions. In the first half reaction, oxidation takes place and in second half reaction, reduction occurs. Oxidation is a process in which a substance loses electrons and in reduction, a substance gains electrons. The substance which gains electrons is reduced and acts as an oxidising agent. On the other hand, a substance which loses electrons is oxidised and acts as a reducing agent. (i) Which of the following is a redox reaction?

(ii) Identify the reaction in which H2 02 is acting as a reducing agent.

(iii) For the following reactions, identify the one in which H 2 S acts as a reducing agent.

(iv) For the following reaction, identify the correct statement. \(\mathrm{ZnO}+\mathrm{CO} \longrightarrow \mathrm{Zn}+\mathrm{CO}_{2}\)

(v) In the following reaction, which substance is reduced? \(\mathrm{PbS}+4 \mathrm{H}_{2} \mathrm{O}_{2} \longrightarrow \mathrm{PbSO}_{4}+4 \mathrm{H}_{2} \mathrm{O}\)

(ii) If the pH of a solution is 8, then its [H + ] ion is

(iii) In terms of acidic strength, which one of the following is in the correct increasing order?

(iv) Which of the following compounds does not give H + ions in aqueous solution?

(v) Four solutions labelled as P, Q, Rand Shave pH values 1, 9, 3 and 13 respectively. Which of the following statements about the given solutions is incorrect?

Baking powder produces carbon dioxide on heating, so it is used in cooking to make the batter spongy. Although, baking soda also produces CO 2 on heating, but it is not used in cooking because on heating, baking soda produces sodium carbonate along with carbon dioxide. Sodium carbonate, thus, produced, makes the taste bitter. Baking powder is the mixture of baking soda and a mild edible acid. Generally, tartaric acid is mixed with baking soda to make baking powder. When baking powder is heated, NaHCO 3 decomposes to give CO 2 which makes bread and cake fluffy. Tartaric acid helps to remove bitter taste due to formation of sodium tartrate. \(2 \mathrm{NaHCO}_{3}+ \ \ \mathrm{C}_{4} \mathrm{H}_{6} \mathrm{O}_{6} \quad \longrightarrow \quad 2 \mathrm{CO}_{2}+2 \mathrm{H}_{2} \mathrm{O}+\mathrm{Na}_{2} \mathrm{C}_{4} \mathrm{H}_{4} \mathrm{O}_{6}\) Baking soda Tartaric acid Carbon dioxide Sodium tartrate (i) On passing excess CO 2 gas in aqueous solution of sodium carbonate, the substance obtained is

(ii) When sodium hydrogen carbonate is added to acetic acid, it evolves a gas. Which of the following statements are true about the gas evolved? (I) It turns lime water milky (II) It extinguishes a burning splinter (III) It dissolves in a solution of sodium hydroxide (IV) It has a pungent odour

(iii) Select the correct statement regarding sodium hydrogen carbonate.

(iv) Acetic acid was added to a solid X kept in a test tube. A colourless and odourless gas was evolved. The gas was passed through lime water which turned milky. It was concluded that

(v) Which of the following statements are correct regarding baking soda? (I) Baking soda is sodium hydrogen carbonate (II) On heating, baking soda gives sodium carbonate (III) It is used for manufacture of soap (IV) It is an ingredient of baking powder

The chemical reactivity of an element depends upon its electronic configuration. All elements having less than eight electrons in the outermost shell show chemical reactivity. During chemical reactions, atoms of all elements tend to achieve a completely filled valence shell. Metals are electropositive in nature. They have tendency to lose one or more electrons present in the valence shell of their atoms to form cations and achieve nearest noble gas configuration. The compounds formed by the transfer of electrons from one element to other are known as ionic or electrovalent compounds. (i) The electronic configurations of three elements X, Y and Z are: X : 2 Y: 2, 8, 7 Z : 2, 8, 2 Which of the following is correct regarding these elements?

(ii) Element X reacts with element Y to form a compound Z. During the formation of compound Z, atoms of X lose one electron each whereas atoms of Y gain one electron each. Which of the following properties is not shown by compound Z?

(iii) Which of the following is correct representation of formation of magnesium chloride?

(iv) The electronic configuration of sodium ion is

(v)Which of the following represents an electropositive element?

A hydrocarbon (P) has the molecular formula C 10 H 22 .A hydrocarbon (Q) has two carbon atoms less than (P) and belong to the same homologous series. A hydrocarbon (R) has two carbon atoms more than (P) and belong to the same homologous series. (i) What is the molecular formula of (Q) ?

(ii) To which homologous series do the compound (P), (Q) and (R) belong?

(iii) What is the molecular formula of (R) ?

(iv) Identify the correct statement about compounds (P), (Q) and (R) .

(v) Compounds (P), (Q) and (R) are

The recurrence of properties of the elements after a certain regular intervals, when they are arranged in the increasing order of their atomic numbers, is called periodicity. There are a number of physical properties such as atomic size, metallic and non -metallic character, etc. which show periodic variation. In periodic table, various properties vary differently from moving left to right in a period and going down in a group. In a period, properties vary because from moving left to right in a period, number of shells remain same but valence electron increases by one number hence nuclear charge increases. In a group, on going down, number of valence shells increases while number of valence electrons remains same. (i) From top to bottom in a group of the periodic table, the electropositive character of the element

(ii) Which element has the largest size in the second period?

(iii) Which of the following elements has three valence electrons?

(iv) In the periodic table, the metallic character of elements (a) decreases from left to right and decreases down the group (b) decreases from left to right and increases down the group (c) increases from left to right and increases down the group (d) increases from left to right and decreases down the group (v) Which of the following increases along the period?

The small intestine is the longest part of the alimentary canal. It is a narrow tube of about 6 metres which lies coiled in the abdomen. The length of small intestine varies in different animals depending on the type of food they eat. (i) Humans are not able to digest cellulose whereas they are able to digest starch due to

(iii) Butter cannot be digested in the stomach as lipase and bile are(a) released in small intestine

(iv) Which of the following is a correct statement? (a) Herbivores have shorter small intestine as they eat grasses (b) Carnivores have larger small intestine as they eat meat (c) Herbivores have larger small intestine as they eat grasses (d) None of these (v) Various types of movements are generated by the ______ layer of the small intestine.

(iii) Which of the following animals shows double circulatory pathway?

(v) Select the option which properly represents pulmonary circulation in humans. \(\text { (a) Left auricle } \frac{\text { Deoxygenated }}{\text { blood }}{\longrightarrow} \text { Lungs } \frac{\text { Oxygenated }}{\text { blood }} \text { Right ventricle }\) \(\text { (b) Left auricle } \frac{\text { Oxygenated }}{\text { blood }}{\longrightarrow} \text { Lungs } \frac{\text { Deoxygenated }}{\text { blood }}{\longrightarrow} \text { Right ventricle }\) \(\text { (c) Right ventricle } \frac{\text { Deoxygenated }}{\text { blood }}{\longrightarrow} \text { Lungs } \frac{\text { Oxygenated }}{\text { blood }} \rightarrow \text { Left auricle }\) \(\text { (d) Right ventricle } \frac{\text { Oxygenated }}{\text { blood }}>\text { Lungs } \frac{\text { Deoxygenated }}{\text { blood }} \gg \text { Left auricle }\)

Spore formation, method of asexual reproduction is used by unicellular as well as multicellular organisms.Spores are microscopic units which could be air borne or are present in soil, etc. (i) A slice of bread kept in open for sometime shows growing white cottony mass which later turns black. This happens because (a) bacterial spores present in air germinate on the surface of bread slice (b) fungal spores present in air germinate on the surface of bread slice (c) protozoan microbes start feeding on bread slice (d) none ef these. (ii) Spore formation can be seen in

(iii) Bulb like structure at top of erect hyphae where spores are produced is

Gregor Mendel conducted hybridisation experiments on garden peas for seven years and proposed the laws of inheritance in living organisms. He investigated characters in the garden pea plant that were manifested as two opposing traits, e.g., tall or dwarf plants, yellow and green seeds, etc. (i) Among the seven pairs of contrasting traits in pea plant as studied by Mendel, the number of traits related to flower, pod and seed respectively were

(ii) The colour based contrasting traits in seven contrasting pairs, studied by Mendel in pea plant were

(iii) Refer to the given table of contrasting traits in pea plants studied by Mendel.

Which of the given traits is correctly placed? (a) (i), (ii) and (iii) only (b) (ii), (iii) and (iv) only (c) (ii) and (iii) only (d) (i), (ii), (iii) and (iv) (iv) Some of the dominant traits studied by Mendel were (a) round seed shape, green seed colour and axial flower position (b) terminal flower position, green pod colour and inflated pod shape (c) violet flower colour, green pod colour and round seed shape (d) wrinkled seed shape, yellow pod colour and axial flower position. (v) Which of the following characters was not chosen by Mendel?

(ii) The angle between the incident ray and the emergent ray is called

(iii) When a ray is refracted through a prism, then

(iv) The angle of deviation depends on

(v) The rectangular surfaces of a prism are known as

Some harmful non-biodegradable chemicals, i.e., pesticides (e.g., DDT) and heavy metals (e.g., mercury, arsenic cadmium, etc.) enter the bodies of organism through the food chain and go on concentrating at each trophic level. This phenomenon is called bio-magnification or biological magnification. (i) Refer to the given food chain Phytoplankton \(\longrightarrow\) Zooplankton \(\longrightarrow\) Small fish \(\longrightarrow\) Large fish \(\longrightarrow\) Fish eating birds If concentration of DDT in small fish is estimated to be 0.5 ppm, then amount of DDT in zooplankton and large fish would respectively be

(ii) Refer to the given table.

According to the given data. The correct order in a food chain will be

(iv) Higher amount of DDT disturb calcium metabolism of birds. This results in

(v) When animals are sprayed with poisons, they may die immediately, but their bodies still contain the poison. The poison in their bodies will then be passed on to the animals which eat them. What would be the consequence of a mass poisoning of the rabbit population in a grazing food chain and why? (a) Plants would die quickly as they are eaten by rabbits (b) Grasshopper would die quickly as all the animals in the food web would be affected (c) Western rattlesnakes would quickly become poisoned as they eat rabbits (d) Hawk would become poisoned as they feed on rabbits

(v) Greenhouse effect is due to

Energy flow is the key function of an ecosystem. It is determined by the two basic laws of thermodynamics. Flow of energy in our ecosystem is unidirectional. Green plants capture approximately about 1% of the solar energy incident on the earth to carry out the process of photosynthesis. In an ecosystem, transfer of energy follows 10 percent law, i.e., only 10% energy is transferred from one trophic level to another and remaining 90% of energy is lost in respiration. (i) Read the given statements and select the incorrect one(s). I. At each trophic level organisms utilise energy in respiration. II. Only 10 percent of the solar radiations that fall on earth is used by green plants. III. Green plants are the ultimate source of entire energy as most of the food chain begin with them. IV. A food chain usually consist of 3-4 trophic levels.

(ii) Refer to the given flow chart. Plants \(\rightarrow\) Rat \(\rightarrow\) Snake 20 units 2 units 0.2 unit The given flow chart states that (a) flow of energy in an ecosystem is unidirectional (b) as we move along in a food chain the number of individuals at each trophic level decreases (c) only 10% of the total energy becomes available to next trophic level (d) both (a) and (c). (iii) Nearly 90% of the energy is wasted while moving from one trophic level to other. This energy is used in

(v) Which of the following correctly states the processes involved in energy transfer between the trophic levels?

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Cbse 10th standard science subject case study questions answer keys.

(I) (b) : H 2 is oxidised to HCI while Cl 2 is reduced to HCl. (ii) (c) \((iii) (c): 2 \mathrm{Fe} \mathrm{Cl}_{3}+\mathrm{H}_{2} \mathrm{~S} \longrightarrow 2 \mathrm{FeCl}_{2}+2 \mathrm{HCl}+\mathrm{s}\) H 2 Sitself gets oxidised to Sand reduces FeCl 3 to FeCI 2 (iv) (a ): ZnO is reduced to Zn and CO is oxidised to CO 2 (v) (b) : H 2 O 2 is reduced to water by removal of oxygen.

(i) (c): As the pH value increases from 7 to 14, it represents decrease in H+ ion concentration in the solution. (ii) (c) : pH = -log l0 [H + ] = 8 log l0 [H + ] =-8 [H + ] = 10 - 8 mol/L (iii) (a) (iv) (b): C 2 H 5 OH is not an ionic compound, it is a covalent compound and hence does not give H + ions in aqueous solution. (v) (c) : (a) Lower the pH of the solution, more acidic is the solution and higher is the [H + ] ions Thus, solution P (pH = 1) has higher [H + ] ions than solution R (pH = 3). (b) Higher the pH of the solution, more basic is the solution and higher is the [OH - ] ions Thus, solution Q (pH = 9) has lower [OH - ] ions than solution S (pH = l3). (c) Solution P (pH = 1) is acidic which turns blue litmus solution red whereas solution Q (pH = 9) is basic which turns red litmus solution blue. (d) Solution P (pH = 1) is highly acidic while solution S (pH = l3) is highly basic and solution Q (pH = 9) is weakly basic.

\({ (i) }(\mathrm{b}): \mathrm{Na}_{2} \mathrm{CO}_{3}+\mathrm{H}_{2} \mathrm{O}+\mathrm{CO}_{2} \longrightarrow 2 \mathrm{NaHCO}_{3}\) (ii) (b) : \(\mathrm{NaHCO}_{3}+\mathrm{CH}_{3} \mathrm{COOH} \longrightarrow \mathrm{CH}_{3} \mathrm{COONa}\) \(+\mathrm{CO}_{2} \uparrow+\mathrm{H}_{2} \mathrm{O}\) Carbon dioxide gas is evolved which turns limewater milky. It extinguishes a burning splinter since it is not a supporter of combustion. It dissolves in sodium hydroxide solution and it is an odourless gas. \({ (iii) }(\mathrm{c}): 2 \mathrm{NaHCO}_{3} \stackrel{\text { Heat }}{\longrightarrow} \mathrm{Na}_{2} \mathrm{CO}_{3}+\mathrm{H}_{2} \mathrm{O}+\mathrm{CO}_{2}\) NaHCO 3 is soluble in water. \({ (iv) }(\mathbf{b}): \mathrm{NaHCO}_{3}+\mathrm{CH}_{3} \mathrm{COOH} \longrightarrow\) \(\mathrm{CH}_{3} \mathrm{COONa}+\mathrm{CO}_{2}+\mathrm{H}_{2} \mathrm{O}\) (v) (c): It is not used in manufacture of soap .

(i) (d) (Ii) (b): '2' is an ionic compound \({ (iii) }(\mathrm{a}): \mathrm{Mg} \longrightarrow \mathrm{Mg}^{2+}+2 e^{-}\) \(\mathrm{Cl}+e^{-} \longrightarrow \mathrm{Cl}^{-}\) \(\mathrm{Mg}^{2+}+2 \mathrm{Cl}^{-} \longrightarrow \mathrm{MgCl}_{2}\) 2,8,2 2,8 2,8,7 2,8,8 \((\text { iv })(\mathrm{d}): \mathrm{Na} \longrightarrow \mathrm{Na}^{+}+e^{-}\) 2,8,1 2,8 (v) (c): (a) and (d) represent electronegative elements and (b) represents a noble gas.

(i) (c) : Molecular formula of (Q) is CSH1Sas it has two carbon atoms less than (P). (ii) (c): Compounds (P), (Q) and (R) are alkanes having general formula C n H 2n+2 . (iii) (a): Molecular formula of (R) is C 12 H 26 as it has two carbon atoms more than (P) (iv) (b): Compound (P), (Q) and (R) belong to same homologous series so they have different physical properties but similar chemical properties. They have same general formula C n H 2n+2 .They . differ by 2 carbon atoms and 4 hydrogen atoms. (v) (a)

(i) (a): As the size of the atom increases down the group, electropositive character increases. (ii) (c): Li is the first element of the second period. As the size decreases in the period from left to right, therefore, Li is the largest atom in the period. (iii) (c): Al (Z = 13) : 2, 8, 3 (iv) (b): Metallic character of elements decreases from left to right and increases down the group. (v) (a): As we move from left to right along a period, the number of valence electrons increases from 1 to 8.

(i) (a): In human, cellulose is indigestible as it cannot be broken into smaller molecules due to absence of cellulase enzyme. (ii) (b): Finger-like projections that come out from mucosa of intestine form villi. Cells lining the villi produce numerous microscopic projections called microvilli giving a brush border appearance which increase the surface area for absorption enormously. Villi has a good supply of capillaries and a large lymph vessel for absorption of nutrients. If the inner lining of the small intestine will be smooth, the surface for absorption will be reduced. (iii) (a) (iv) (c) (v) (b)

(i) (c): A- Artery: Carries blood from heart to different body parts. It is thick-walled and elastic. It acts as a "pressure reservoir" for maintaining the blood flow. B - Capillary : Nutrients, hormones, gases, etc. can diffuse into tissue cells through capillaries and vice versa. It is thin-walled, and only one cell layer thick resting on basement membrane. C - Vein: Brings blood from different body parts to the heart. It is thin-walled and act as low-resistance conduct for blood flow. D - Pulmonary vein: Two pulmonary veins from each lung transport the oxygenated blood to the left atrium. (ii) (d): In amphibians, the left atrium receives oxygenated blood from the gills/lungs/skin and the right atrium gets the deoxygenated blood from other body parts. However, they get mixed up in the single ventricle which pumps out mixed blood i.e., incomplete double circulation (iii) (d): Whale is a mammal and in mammals, two separate circulatory pathways are found - systemic circulation and pulmonary circulation. Oxygenated and deoxygenated bloods received by the left and right atria respectively pass on to the left and right ventricles. Thus, oxygenated and deoxygenated bloods are not mixed. This is referred to as double circulation. (iv) (a) (v) (c): Pulmonary circulation is the movement of blood between heart and lungs. During this pathway deoxygenated blood entering the right atrium, moves into the right ventricle. From here it moves through the pulmonary arch into the lungs for oxygenation. Then from lungs the oxygenated blood moves into the left atrium through pulmonary veins.

(i) (b): The tiny spores of bread mould (Rhizopus) are always present in air. On coming in contact with moist surface of bread slice they settle on it and germinate to form new fungal hyphae which first look like white cottony mass and later turns black. (ii) (a): Mucor (fungus) reproduces asexually through spore formation. (iii) (d) (iv) (c) : Bacteria produce endospore which is a dormant and tough structure that enables bacteria to remain dormant for extended periods under unfavorable conditions. (v) (d)

(i) (a) : Characters studied by Mendel are as follows:

(i) (a): The angle between the two refracting surfaces of a prism is called angle of prism. (ii) (b): The angle between the incident ray and the emergent ray is called angle of deviation. (iii) (d): As the ray of light enters from rarer medium (air) to denser medium (glass), the angle of incidence is more than angle of refraction. (iv) (c): More be the refractive index, more be the angle of deviation and it also depends on the refractive index of prism. (v) (c): The refraction of light takes place through rectangular surfaces.

(i) (c): No two magnetic field lines are found to cross each other. If two field lines crossed each other, it would mean that at the point of intersection, the compass needle would point in two directions at the same time, which is not possible. (ii) (d): The magnetic field and hence the magnetic line of force exist in all the planes all around the magnet. (iii) (d): The relative strength of the magnetic field is shown by the degree of closeness of the field lines and the direction of the magnetic field is obtained by tangent to the field lines at the point of intersect. (iv) (d): The magnetic field lines due to a bar magnet are closed continuous curves directed from N to S outside the magnet and directed from S to N inside the magnet. Hence option (d) is correct. v) (d): Inside a bar magnet, the direction of field lines is from south pole to north pole

(i) (a): Due to bio-rnagnification, the concentration of DDT will always be less in zooplanktons than large fish (ii) (c) (iii) (b) : Due to bio-rnagnification the nonbio-degradable chemicals such as DDT accumulate and go on concentrating at each trophic level. (iv) (d) : Higher amounts of DDT disturb calcium metabolism of birds resulting in thinning of egg shells and their prematllre breaking that kills the embryos. (v) (d)

( i) (b) : In the given pie chart, gases P, Q, Rand S respectively are CO 2 , CH 4 , CFCs and N 2 O. Methane is produced by incomplete combustion of biomass. (ii) (c): Methane (gas Q) is produced by incomplete biomass combustion and incomplete decomposition mostly by anaerobic methanogens. Flooded paddy fields, marshes and cattles are the major source of this gas. (iii) (c) : CO 2 is the principal greenhouse gas that helps to keep the earth warm. (iv) (d) (v) (c)

(i) (b): 1% of solar radiation is captured by plants. Sun is the ultimate source of all energy. (ii) (d) (iii) (d) (iv) (d): The given pyramid is pyramid of energy that shows the two basic laws of thermodynamics. (v) (c): Light energy from the sun is converted to chemical energy in producers via photosynthesis. This chemical energy is then transferred to primary consumer, then subsequently to secondary consumer via feeding.

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Case Study Questions Class 10 Science Chapter 2 Acids, Bases, and Salts

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CBSE Board Exam is on the way, so you must practice some good Case Study Questions Class 10 Science to boost your preparation to score 95+% on Boards. In this post, you will get Case Study and Passage Based Questions that will come in CBSE Class 10 Science Board Exams.

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In CBSE Class 10 Science Paper, Students will have to answer some questions based on Assertion and Re a son . There will be a few questions based on case studies and passage-based as well. In that, a paragraph will be given, and then the MCQ questions based on it will be asked.

Acids, Bases, and Salts Case Study Questions With Answers

Here, we have provided case-based/passage-based questions for Class 10 Science Chapter 2 Acids, Bases, and Salts

Case Study/Passage-Based Questions

Case Study 1:

A compound, X of sodium forms a white powder. It is a constituent of baking powder and is used in some antacids. When heated it gives a compound, Y which is anhydrous and absorbs water to become a hydrated salt. When this salt is kept in the open air, it loses water molecules in a process called efflorescence. When dissolved in water it forms a strong base and a weak acid, Z.

(i) What is the compound, X?

Answer: (c) NaOH.

(ii) The compound, Y is

Answer: (c) Na2CO3.10H2O

(iii) What is the nature of the solution formed by dissolving Y in water?

Answer: (a) Alkaline

(iv) Identify the compound, Z.

Answer: (b) H2CO3

(v) Sodium carbonate is a basic compound because it is a salt of a

Answer: (c) strong acid and weak base

Case Study 2:

pH is quite useful to us in a number of ways in daily life. Some of its applications are:

Control of pH of the soil : Plants need a specific pH range for proper growth. The soil may be acidic, basic, or neutral depending upon the relative concentration of H* and OH-. The pH of any soil can be determined by using pH paper. If the soil is too acidic, it can be corrected by adding lime to it. If the soil is too basic, it can be corrected by adding organic manure which contains acidic materials.

Regaining shine of a tarnished copper vessel by use of acids : A copper vessel gets tarnished due to formation of an oxide layer on its surface. On rubbing lenion on the vessel, the surface is cleaned and the vessel begins to shine again. This is due to the fact that copper oxide is basic in nature, which reacts with the acid (citric acid) present in lemon to form a salt (copper citrate) which is washed away with water. As a result, the layer of copper oxide is removed from the surface of the vessel and the shining surface is exposed.

Self-defence by animals through chemical warfare : Stings of bees and ants contain methanoic acid. When stung, it causes lot of pain and irritation. This can be cured by rubbing the affected area with mild base like baking soda.

(i) When black copper oxide placed in a beaker is treated with dilute HCl, its color changes to ( a) white (b) dark red (c) bluish-green (d) no change.

Answer: (c) bluish green

(ii) P is an aqueous solution of acid and Q is an aqueous solution of base. When these two are diluted separately, then (a) pH of P increases while that of Q decreases till neutralization.

(b) pH of P decreases while that of Q increases till neutralization. (C) pH of both P and Q decrease. (d) pH of both P and Q increase.

Answer: (a) pH of P increases while that of Q decreases till neutralisation.

(iii) Which of the following acids is present in bee sting? (a) Formic acid (b) Acetic acid (c) Citric acid (d) Hydrochloric acid

Answer: (c) Citric acid

(iv) Sting of ant can be cured by rubbing the affected area with soap because (a) it contains oxalic acid which neutralises the effect of formic acid (b) it contains aluminium hydroxide which neutralises the effect of formic acid (c) it contains sodium hydroxide which neutralises the effect of formic acid (d) none of these

Answer: (c) it contains sodium hydroxide which neutralises the effect of formic acid

(v) The pH of soil X is 7.5 while that of soil Y is 4.5. Which of the two soils, should be treated with powdered chalk to adjust its pH? (a) X only (b) Y only (c) Both X and Y (d) none of these

Answer: (b) Y only

Case Study 3: Acids, bases, and salts are essential substances in our daily lives and play crucial roles in various chemical reactions and processes. Acids are sour-tasting substances that can donate hydrogen ions (H+) when dissolved in water. They turn blue litmus paper red and have a pH value less than 7. Bases, on the other hand, are bitter-tasting substances that can accept hydrogen ions or donate hydroxide ions (OH-) when dissolved in water. They turn red litmus paper blue and have a pH value greater than 7. Salts are formed when acids react with bases, resulting in the neutralization process. They are formed by the combination of positive ions (cations) from bases and negative ions (anions) from acids. Understanding the properties and uses of acids, bases, and salts is important in various applications, such as in the preparation of medicines, household cleaning agents, and agricultural practices.

What are acids? a) Substances that can donate hydrogen ions when dissolved in water b) Substances that can accept hydrogen ions when dissolved in water c) Substances that turn blue litmus paper red d) Substances with a pH value less than 7 Answer: a) Substances that can donate hydrogen ions when dissolved in water

How are bases characterized? a) Sour-tasting substances b) Substances that can donate hydrogen ions c) Substances that turn red litmus paper blue d) Substances with a pH value less than 7 Answer: c) Substances that turn red litmus paper blue

What are salts formed from? a) Acids and bases b) Acids and metals c) Bases and metals d) Bases and water Answer: a) Acids and bases

What is the pH value of acids? a) Less than 7 b) Equal to 7 c) Greater than 7 d) Variable Answer: a) Less than 7

In which applications are acids, bases, and salts commonly used? a) Preparation of medicines b) Household cleaning agents c) Agricultural practices d) All of the above Answer: d) All of the above

Hope the information shed above regarding Case Study and Passage Based Questions for Class 10 Science Chapter 2 Acids, Bases, and Salts with Answers Pdf free download has been useful to an extent. If you have any other queries about CBSE Class 10 Science Acids, Bases, and Salts Case Study and Passage Based Questions with Answers, feel free to comment below so that we can revert back to us at the earliest possible. By Team Study Rate

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CBSE Class 10 Chemistry Notes

Chapter 1: chemical reactions and equations.

Characteristics of Chemical Reactions
Types of Chemical Reactions
Reactants and Products
Chemical Equations - Definition, Representation, Types
How to Balance Chemical Equations?
Writing and Balancing Chemical Equations
Difference between Endothermic and Exothermic Reactions
What are the Conditions required for a Chemical Reaction?
Oxidizing and Reducing Agents
Decomposition Reaction
Effects of Oxidation Reactions in Everyday Life
Corrosion and Rancidity
What is Rancidity and How to prevent them?

Chapter 2: Acids, Bases, and Salts

Acids, Bases and Salts
Chemical Indicators - Definition, Types, Examples
Difference between Mineral Acids and Organic Acids
Strength of Acids
Concentrated and Dilute Acids
Properties of Acids - Definition, Examples, Properties, Uses
What do all Acids have in Common?
Are all compounds that contain hydrogen not an acid?
Uses of Mineral Acids in Industries
Difference between Alkalis and Bases
What do All Bases Have in Common?
Strong and Weak Bases
Acids and Bases
Importance of pH in Everyday Life
Explain the pH Change As the Cause Of Tooth Decay
What is meant by Family of Salts?
Acidic, Basic and Neutral Salts
What is Sodium Chloride? - Definition, Preparation, Properties, Uses
Bleaching Powder
Cleansing Action of Soaps and Detergents
Water of Crystallization

Chapter 3: Metals and Non-Metals

Metals and Non-Metals
Exceptions in Physical Properties of Metals and Non-Metals
Difference between Metals and Non-Metals
Reactivity Series - Reactivity of Metals, Features, Tricks
Uses of Metals and Non-Metals
What are the causes of Chemical Bonding?
Types of Chemical Bonding
Ionic Bonds and Ionic Compounds
Covalent Bonds - Definition, Types, Properties, Examples
What are Covalent Compounds? Definition, Formation, Properties
Properties of Ionic and Covalent Compounds
Occurrence of Metals, Minerals and Ores
Extraction of Metals from Ores
Concentration of Ore - Definition, Methods of Separation, Examples
Conversion of Ore into Metal
Extraction of Highly Reactive Metals
Extraction of Moderately and Less Reactive Metals
What is Refining of Metals?
What is Corrosion?
Corrosion of Metals
Platinum - Definition, Occurrence, Properties, Applications

Chapter 4: Carbon and its Compounds

Why does Carbon Always Form Covalent Bonds?
Why is Carbon considered Tetravalent?
Allotropes of Carbon
Diamond and Graphite - Structure, Uses, Properties, Applications
What is Catenation and Tetravalency?
What are Hydrocarbons?
Saturated and Unsaturated Hydrocarbons
Alkyl Groups and Cyclic Hydrocarbons
Functional Groups
Chemical Properties of Carbon Compounds
Hydrogenation of Oils
Difference Between Soap and Detergent

Chapter 5: Periodic Classification of Elements

Dobereiners Triads - Definition, Types, Limitations
Newland’s Law of Octaves
Classification of Elements
Mendeleev Periodic Table
Merits of Mendeleev’s Periodic Table
Anomalies of Mendeleev’s Periodic Table
Modern Periodic Law
Characteristics of the Periods and Groups of the Periodic Table
Merits of the Modern Periodic Table

Class 10 Chemistry Notes by GeeksforGeeks have been developed as per the Latest pattern prescribed by CBSE for Class 10 Boards Exam 2021-22 . In these revisions notes, all the important concepts and topics are covered Chapterwise. These notes are more useful as these are prepared according to the revised and reduced CBSE syllabus for Class 10 Science. Here, learners can easily access the chapter-wise notes from the below-mentioned links for quick and effective revision for the CBSE Class 10 Science Board Exam 2021 .

By the time students come to Class 10, they already have some understanding of the Basic concept of Science. Hence, the below-mentioned Chemistry revision notes for them are built on the concepts they have already learnt in Class 8 and Class 9. Here the important chapters like Carbon and its compounds , Periodic Classification of elements , Acids, Bases, and Salts , etc are presented in an easy manner for thorough learning as well as for quick revision.

Class 10 Science is crucial to understand for all the students to attain good marks in board exams. While students find Biology a little easy subject to understand, Physics and Chemistry always seem tough to understand, and that is why students try to memorize their concepts which is not the right thing. Talking about Class 10 Chemistry, it is easy to learn if you get the idea of the basic concept.

Chemical Reactions
Reactant and Products
Chemical Equations – Definition, Representation, Types
Difference between Exothermic and Endothermic Reactions
Decomposition Reactions in Our Body

Chapter 2: Acids, Bases, and Salts

CBSE Class 10 students can get here the notes for Science Chapter 2 – Acids, Bases, and Salts. These notes are entirely according to the latest CBSE Syllabus for Class 10 Science and are best for quick revision of the important topics from the chapter. Each topic has been explained in a simple manner that is quite easy to understand. Students should also attempt the questions given at the end of the revision notes for self-assessment.

Acids, Bases , and Salts
Chemical Indicators – Definition, Types, Examples
Properties of Acids – Definition, Examples, Properties, Uses
What do All Acids Have in Common?
Uses of Mineral Acids in Industry
What are Bases? – Definition, Examples, Types, Properties , and Uses
How Strong are Acids and Bases on pH Scale?
What is a Universal Indicator?
What is Sodium Chloride? – Definition, Preparation, Properties, Uses
Caustic Soda, Washing Soda , and Baking Soda – Preparation, Chemical Formula, Properties
Bleaching Powder – Definition, Structure, Preparation, Properties

Chapter 3 science class 10th notes are one of the most important guides for the students who want to score good marks in their Class 10 science board exam. The content that these revision notes provide has been made by some of the very experienced science teachers. They have prepared these notes strictly keeping in mind the updated CBSE guidelines for class 10 science. Notes of chapter 3 science class 10 metals and non-metals contain some significant topics that have high marks weightage to come in board exams.

Metals and Non-Metals – Definition, Properties, Uses, and Applications
Reactivity Series of Metals
Noble Gases
Types of Chemical Bonds
Covalent Bonds – Definition, Types, Properties, Examples
Occurrence of Metals, Minerals, and Ores
Concentration of Ore – Definition, Methods of Separation, Examples
Conversion of Concentrated Ore into Metal
Rusting of Iron – Explanation, Chemical Reaction, Prevention
What is Gold? – Definition, Properties, Uses , and Applications
Platinum – Definition, Occurrence, Properties, Applications
Alloys – Definition, Composition, Properties , and Uses

Check CBSE Class 10 Science Quick Revision Notes for Chapter 4 – Carbon and its Compounds. These notes have been prepared according to the revised syllabus. Topics excluded from the reduced syllabus have not been covered in these revision notes. You refer to these notes for the quick revision of the chapter before the upcoming CBSE Class 10 Science Board Exam 2021. You may also solve the questions given at the end of the notes for self-assessment.

Carbon – Definition, Properties, Occurrence, Applications
Diamond and Graphite – Structure, Uses, Properties, Applications
Functional Groups in Organic Compounds
Ethanol – Definition, Properties, Uses, Harmful Effects
Ethanoic Acid – Structure, Properties, Uses, Sample Questions
Difference Between Soaps and Detergents

Check CBSE Class 10 Science Notes for Chapter 5 – Periodic Classification of Elements for quick revision before Board Exam 2021. These notes are according to the revised CBSE Class 10 Science Syllabus. All the topics have been explained in a simple way. It will take only about 10-15 minutes to revise the whole chapter with the help of these quick revision notes.

Dobereiners Triads – Definition, Types, Limitations
Mendeleev’s Periodic Table Based on Atomic Masses of Elements

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CBSE Organises Science Challenge Programme For Students Of Classes 8 To 10

The cbse science challenge comprises two rounds: an intra-school competition and an inter-school challenge. the challenge paper will include multiple-choice questions, with a focus on both speed and accuracy..

CBSE Science Challenge comprises two rounds: an intra-school competition and an inter-school challenge.

The Central Board of Secondary Education (CBSE) has initiated the Science Challenge programme aimed at fostering curiosity, inquiry, and advancing critical thinking and problem-solving abilities among students in classes 8 to 10.

This initiative, hosted on the CBSE platform, will be available until May, with its core theme around Science, Environment, and Sustainability. The CBSE Science Challenge comprises two rounds: an intra-school competition and an inter-school challenge.

Notably, there is no application fee for students participating in either stage of this enrichment activity.

Students from classes 8 to 10 in CBSE-affiliated schools are eligible to compete in the first round, with school registration required for participation.

In the second round, schools that registered in the initial stage can nominate their top six students from each participating class.

The challenge paper will include multiple-choice questions, with a focus on both speed and accuracy.

Participants in the second round will receive online participation certificates from the Board, while top-performing students will be awarded appreciation certificates.

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Schools are encouraged to facilitate student participation in the CBSE Science Challenge, offering them a chance to hone and showcase their skills.

For further inquiries or clarifications, interested parties can reach out via email at [email protected] or by calling 011-23238361.

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CBSE Class 10 Syllabus

CBSE Class 10 Science Syllabus 2024-25: Download PDF Here

Cbse class 10 science syllabus 2024-25: check here the new cbse syllabus for class 10 maths to know the course content and examination scheme prescribed for the academic year 2024-2025. download the full syllabus in pdf..

CBSE Class 10 Science Syllabus 2024-2025: CBSE Class 10 Science syllabus for the 2024-2025 academic session has been released at the board’s official website, cbse.gov.in. Knowing the latest syllabus is essential to start the academic year as it will provide students with a clear understanding of the topics and concepts they have to cover during the year. Staying updated with the syllabus will help them plan their studies effectively, stay organized, and focus on the areas that need more attention.

The CBSE Class 10 Science syllabus has been designed around five broad themes which are

1. Materials

2. The World of The Living

3. How Things Work

4. Natural Phenomenon and

5. Natural Resources.

CBSE Class 10 Science Syllabus 2024-25 Highlights

Cbse class 10 science syllabus 2024-2025, cbse class 10 science course content for 2024-2025, theme: materials, unit 1: chemical substances - nature and behaviour.

Chemical reactions: Chemical equation, Balanced chemical equation, implications of a balanced chemical equation, types of chemical reactions: combination, decomposition, displacement, double displacement, precipitation, endothermic exothermic reactions, oxidation and reduction.

Acids, bases and salts: Their definitions in terms of furnishing of H + and OH – ions, General properties, examples and uses, neutralization, concept of pH scale (Definition relating to logarithm not required), importance of pH in everyday life; preparation and uses of Sodium Hydroxide, Bleaching powder, Baking soda, Washing soda and Plaster of Paris.

Metals and nonmetals: Properties of metals and non-metals; Reactivity series; Formation and properties of ionic compounds; Basic metallurgical processes; Corrosion and its prevention.

Theme: The World of the Living

Unit 2: world of living.

Life processes: ‘Living Being’. Basic concept of nutrition, respiration, transport and excretion in plants and animals.

Control and co-ordination in animals and plants: Tropic movements in plants; Introduction of plant hormones; Control and co-ordination in animals: Nervous system; Voluntary, involuntary and reflex action; Chemical co-ordination: animal hormones.

Reproduction: Reproduction in animals and plants (asexual and sexual) reproductive health - need and methods of family planning. Safe sex vs HIV/AIDS. Child bearing and women’s health.

Theme: Natural Phenomena

Unit 3: natural phenomena.

Reflection of light by curved surfaces; Images formed by spherical mirrors, centre of curvature, principal axis, principal focus, focal length, mirror formula (Derivation not required),magnification.

Refraction; Laws of refraction, refractive index. Refraction of light by spherical lens; Image formed by spherical lenses; Lens formula(Derivation not required); Magnification. Power of a lens.

Human eye: Functioning of a lens in human eye, defects of vision and their corrections, applications of spherical mirrors and lenses.

Theme: How Things Work

Unit 4: effects of current.

Electricity: Electric current, potential difference and electric current. Ohm’s law; Resistance, Resistivity, Factors on which the resistance of a conductor depends. Series combination of resistors, parallel combination of resistors and its applications in daily life. Heating effect of electric current and its applications in daily life. Electric power, Interrelation between P, V, I and R.

Theme: Natural Resources

Unit 5: natural resources, cbse class 10 science practicals.

CBSE Class 10 Science Internal Assessment 2024-25

PRESCRIBED BOOKS for CBSE Class 10 Science:

Science-Text book for class X- NCERT Publication
Assessment of Practical Skills in Science- Class X- CBSE Publication
Laboratory Manual-Science-Class X, NCERT Publication
Exemplar Problems Class X – NCERT Publication

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CBSE Board Class 10th and 12th Result 2024: CBSE Board Likely to Release Result Soon at cbse.nic.in

CBSE Class 10th and 12th Board Exam Results 2024: The Class 10th and Class 12th board examinations conducted by the Central Board of Secondary Education ( CBSE ) got over on April 2nd, 2024 . This year, Central Board of Secondary Education ( CBSE) has successfully conducted the Class 10th and 12th Board Exams , encompassing over 38 lakh students across 21,499 schools this year. Expectations are high for the announcement of CBSE Class 10 and 12 results 2024, set to be disclosed on the official websites (cbse.nic.in and cbse.gov.in). Results for Class 12, covering Science, Commerce, and Arts streams, will be released together.

CBSE is set to reveal the Class 10 and 12 Results for 2024 on its official websites , (cbse.gov.in and results.cbse.nic.in). Expected in mid-May, the exact date and time of the announcement remain undisclosed by the Central Board of Secondary Education (CBSE), as reported by various media outlets.

Students can access their results using their admit card numbers, roll numbers, and school codes as indicated in their admit cards. The CBSE Board Result 2024 will have important details such as student names, roll numbers, dates of birth, subject-wise marks, and grades. Furthermore, results for both Class 10 and 12 can be accessed through SMS, DigiLocker, and the UMANG App. However, it’s crucial to understand that the online CBSE Results 2024 are provisional, necessitating students to collect their original mark sheets from their respective schools.

Overview for CBSE Class 10 and 12 Result 2024

Details available in cbse class 10th and 12th marksheet 2024, passing marks criteria for cbse class 10 and 12 result 2024, step-by-step guide to checking cbse class 10th and 12th result 2024.

Exam Name: CBSE Board Examinations

CBSE 10th Exams 2024: February 15, 2024, to March 13, 2024

CBSE 12th Exams 2024: February 15, 2024, to April 02, 2024

CBSE Result 2024 Class 10 Date: First week of May 2024 (Tentative)

CBSE Result 2024 Class 12 Date: Second week of May 2024 (Tentative)

CBSE Compartment Result 2024 Class 10, 12: Expected in the first week of August 2024

CBSE Result 2024 Website: results.cbse.nic.in and cbse.gov.in

CBSE Result 2024 Class 12, 10 Available on: Online portal, SMS, IVRS, DigiLocker, Google, SMS Organizer app

Note: Dates mentioned above for result are tentative, for official dates and result students are advised to wait for official notification or confirmation.

The following details will be included in the CBSE 2024 Result:

Student’s Name
Roll Number
Mother’s Name
Father’s Name
Date of Birth
Subject Name
Subject Code
Theory Marks
Practical Marks
Total Marks
Final Result: Pass/Not Pass

Students will be deemed to have successfully cleared the CBSE board exams if they meet the following criteria:

To pass the CBSE Result 2024, a student must secure a minimum of 33% overall (considering both internal assessment and Board examination marks) in all subjects.

For checking and accessing CBSE Class 10th and 12th Result 2024, students ay follow the steps given below:

Go to the official website of the Central Board of Secondary Education ( CBSE ) (www.cbse.gov.in/ or results.cbse.nic.in/).
Look for the link titled “School Certificate Examination (Class X/XII) Results 2024”
Enter your login credentials, including Roll Number, School Number, Admit Card ID, and Security PIN.
Your CBSE Class 10th and 12th Result 2024 will be displayed on the screen.
Download and print a copy for future reference.

Q. When will the CBSE Class 10 and 12 results for 2024 be released?

The CBSE results for Class 10 and 12 are anticipated to be revealed in early May 2024.

Q. How can I access my CBSE Class 10th and 12th results for 2024?

You can access your results on the official websites of CBSE (cbse.nic.in and cbse.gov.in) using your admit card number, roll number, and school number.

Q. What details will be provided in the CBSE Board Result 2024?

The CBSE Result 2024 will include details such as student’s name, roll number, date of birth, subject-wise marks, grades, etc.

Q. In what formats can I view my Class 10 and Class 12 results for 2024?

You can view your results through SMS, DigiLocker, and the UMANG App apart from the online portals.

Q. What are the passing criteria for CBSE Class 10th and 12th Result 2024?

Students need to attain a grade higher than ‘E’ in all subjects and secure a minimum of 33% overall marks to pass the exams.

Q. How can I check my CBSE Result 2024 through IVRS?

Once released, you can check your CBSE Class 10th and 12th Result 2024 through the Interactive Voice Response System (IVRS) by dialing 24300699 along with the area code preceding the number.

Q. What is the procedure to obtain the CBSE Result Digital Marksheet via DigiLocker?

You can download your digital mark sheets via DigiLocker by logging in, syncing Aadhaar (if not done), selecting ‘Central Board of Secondary Education, Delhi’ and relevant document type, and entering passing year and roll number.

Q. What details are included in the CBSE Class 10th and 12th Result 2024?

The CBSE Class 10th and 12th Result 2024 includes student’s name, roll number, mother’s name, father’s name, date of birth, subject name, subject code, theory marks, practical marks, total marks, and final result (pass/not pass).

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Case Study Questions Class 10 Science Acids, Bases and Salts

Case study questions class 10 science chapter 2 acids, bases and salts.

acids bases and salts case study questions and answers

CBSE Class 10 Case Study Questions Science Acids, Bases and Salts. Important Case Study Questions for Class 10 Board Exam Students. Here we have arranged some Important Case Base Questions for students who are searching for Paragraph Based Questions Acids, Bases and Salts.

At Case Study Questions there will given a Paragraph. In where some Important Questions will made on that respective Case Based Study. There will various types of marks will given 1 marks, 2 marks, 3 marks, 4 marks.

CBSE Case Study Questions Class 10 Science Acids, Bases and Salts

Case study : 1.

The reaction between carbon dioxide and calcium hydroxide (lime water), Calcium hydroxide, which is a base, reacts with carbon dioxide to produce a salt and water. Since this is similar to the reaction between a base and an acid, we can conclude that nonmetallic oxides are acidic in nature.

Based on the above paragraph answer the following questions:

i) What is the nature of Carbon dioxide?

Ans: It is a non- metallic oxide as carbon belongs to non- metals group i.e P – Block elements group 6.

ii) Give another reaction of non- metallic oxide and a base?

Ans: CO2(g) + 2NaOH(aq)→ Na2CO3 (aq) + H2O(aq)

iii) Arrange the following bases in increasing order: NaOH, Ca(OH)2 & Mg(OH)2 .

Ans: Mg(OH)2 < Ca(OH)2 < NaOH.

iv) Write the complete reaction between calcium hydroxide and carbon dioxide with physical states?

Ans: Ca(OH)2 (aq) + CO2 (g) → CaCO3 (s) + H2O(l)

v) What is the nature of non- metallic oxide?

Ans: The non- metallic oxide are acidic in nature because when they dissolved in water, they form acidic substance turning blue litmus into red.

CASE STUDY : 2

Take solutions of glucose, alcohol, hydrochloric acid, sulphuric acid, etc. n Fix two nails on a cork, and place the cork in a 100 mL beaker. Connect the nails to the two terminals of a 6 volt battery through a bulb and a switch, as shown in. Now pour some dilute HCl in the beaker and switch on the current. Repeat with dilute sulphuric acid. What do you observe? Repeat the experiment separately with glucose and alcohol solutions. What do you observe now? Does the bulb glow in all cases?

Following the above paragraph, answer the following questions;

i) What was the changes occur in case of acids i.e HCl, H2SO4?

Ans: The bulbs will start glowing as it contains hydrogen ions H+ ions (aq) as cation and Cl- or SO4^2- as anion.

ii) Why do glucose and alcohol do not conduct electricity?

Ans: They do not contains free ions neither cation nor anion. To conduct electricity, free ions are required.

iii) Why do acids do not show acidic behaviour in absence of water?

Ans: Acidic behaviour are shown by releasing of H+ ions from acids. To dissociate into H+ ions, the acids need medium i.e water.

iv) Does rain water or distilled water will conduct electricity?

Ans: Rain water will conduct electricity as it contains both positive and negative ions of different salts in it.

V) Why do aqueous solution of acids conduct electricity?

Ans: The acid contains Hydrogen ions in solutions as well as anions. Due to the presence of free ions they conduct electricity.

CASE STUDY : 3

Plaster of Paris

On heating gypsum at 373 K, it loses water molecules and becomes calcium sulphate hemihydrate ( CaSO 4 .½ H 2 O ). This is called Plaster of Paris.Plaster of Paris is a white powder and on mixing with water, it changes to gypsum once again giving a hard solid mass.

Water of crystallisation is the fixed number of water molecules present in one formula unit of a salt. Five water molecules are present in one formula unit of copper sulphate. Chemical formula for hydrated copper sulphate is Cu SO4 . 5H2O. Now you would be able to answer the question whether the molecule of Na2CO3 .10H2O is wet.

Answer the following questions on the basis of the above paragraph:

i) What is the molecular formula of gypsum?

Ans: CaSO4. 2H2O

ii) Write the equation of formation of plaster of paris by heating gypsum?

Ans: CaSO4. 2H2O + heat👉 CaSO4. 1/2 H2O + 1^1/2 H2O

iii) What are the uses of Plaster of Paris?

Ans: It is used by doctor for supporting of fractured bones, to make toys etc.

iv) Give the equation when POP is mixed with water?

Ans: CaSO4. 1/2H2O + 1^1/2 H2O 👉 CaSO4. 2H2O

v) What does this 2 denotes in CaSO4. 2 H2O?

Ans: 2 denotes the two water molecules as water of crystallisation.

CASE STUDY : 4

Sodium hydroxide When electricity is passed through an aqueous solution of sodium chloride (called brine), it decomposes to form sodium hydroxide. The process is called the chlor-alkali process because of the products formed– chlor for chlorine and alkali for sodium hydroxide.

Based on the above given information, answer the following questions:

i) Write the chemical equation involved in this process?

Ans: 2NaCl (aq)+ 2H2O(l) → 2 NaOH(aq) + Cl2 (g) + H2(g)

ii) What are the substance that are formed at anode and cathode on chlor- alkali process?

Ans: At anode Chlorine gas & at cathode hydrogen gas are formed.

iii) What are the uses of chlorine?

Ans: •Used for water treatment

Disinfectants

pesticides.

iv) Where does the sodium hydroxide solution is formed?

Ans: It is formed near the cathode.

V) What are the uses of Sodium hydroxide?

Ans: • uses in making soaps and detergents

artificial fibres

paper making

CASE STUDY : 5 (Acids Bases and Salts)

Salts of a strong acid and a strong base are neutral with pH value of 7. On the other hand, salts of a strong acid and weak base are acidic with pH value less than 7 and those of a strong base and weak acid are basic in nature, with pH value more than 7.

Answer the following in reference to the above paragraph:

i) Classify the following as strong bases and weak bases: KOH, NaOH, CsOH, NH4OH

Ans: Strong bases: KOH, NaOH, CsOH

Weak base: NH4OH

ii) Write a reaction of a strong acid and a weak base?

Ans- HCl(aq) + NH4OH(aq) → NH4Cl(aq) + H2O(aq)

iii) What happens when strong acids and bases react to each other? Explain by giving example.

Ans: HCl + NaOH → NaCl + H2O

i.e neutral salt is formed.

iv) Identify the following as strong acid: CH3COOH, H2SO4, HNO3, H3PO4, H2CO3, HCl.

Ans: Strong acid: HCl, HNO3, H2SO4.

v) Classify the following acis as strong or weak acid: acetic acid, citric acid, tartaric acid, oxalic acid.

Ans: All are weak acid present in fruits and vegetables.

CASE STUDY : 6

A scale for measuring hydrogen ion concentration in a solution, called pH scale has been developed. The p in pH stands for ‘potenz’ in German, meaning power. On the pH scale we can measure pH generally from 0 (very acidic) to 14 (very alkaline). pH should be thought of simply as a number which indicates the acidic or basic nature of a solution. Higher the hydronium ion concentration, lower is the pH value.

Answer the following on the basis of above paragraph:

i) What does the scale represent when pH value increases from 7 to 14?

Ans: It represents an increase in OH- ions concentration in the solution i.e the increment in the strength of alkali.

ii) What is the pH value of milk of magnesia?

Ans: It is 10.

iii) What are the important of pH in everyday life?

Ans: We human beings, plants and animals all are sensitive to pH i.e their body work on normal pH such as plants grow between the pH range of 6 to 8. Our human body work within the pH range of 7 to 7.8.

iv) What happens when the pH of mouth is lower than 5.5?

Ans: Tooth decay starts in which the enamel gets corroded due to the much production of acids in mouth by bacteria.

V) Two solutions X&Y. The pH of X is 4 and the pH of Y is 7. What is the nature of two solution?

Ans: Solution X is acidic in nature and the solution Y is neutral in nature.

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CBSE Class 12 Geography Syllabus 2024-25: Download PDF

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CBSE 2025 Geography Syllabus for Class 12: There are multiple subjects until the 10th, which streamline into various course streams in Class 11. One such subject is geography. Till Class 10, this subject is taught under Social Science, which becomes an independent subject in Class 11. Students of the humanities generally study this subject in Classes 11 and 12. In CBSE Class 12, the Geography curriculum is divided into two parts: A and B. Part A is for Fundamentals of Human Geography which deals with the human population, its distribution, growth, and development. Part B is about the Indian People and Economy. CBSE has released the new syllabus for the fresh academic session 2024–25. This syllabus comprises detailed information on course structure, course content, a list of practicals, etc. To check and download the CBSE Class 12 Geography Syllabus 2024–25, refer to this article.

CBSE Class 12 Geography Course Structure 2024-2025

A course structure is the blueprint for how a class or learning programme is organised. It defines the key elements that will guide students towards achieving the course's learning objectives. Check the complete CBSE Class 12 Geography course structure for 2024–2025 here.

Fundamental of Human Geography

India People and Economy

Geography Practical-II

CBSE Class 12 Geography Course Content 2024-25

Unlike course structure, course content explains the topics that need to be covered along with its objectives, process and expected outcomes. Check the CBSE Class 12 Geography syllabus or Course content 2024-25 here.

CBSE Class 10 Geography Practical Work 2024-25

CBSE 12th Geography also comprises the practical part which deals with learning about various aspects of natural resources and their location on the map. Check the Practical Work in Geography Part II here.

CBSE Class 12 Geography Map Work 2024-25

Map Items for identification only on the outline political map of the World Fundamentals of Human Geography.

Map Items for locating and labelling on political outline map of India India - People and Economy

CBSE Class 12 Syllabus 2024-25 (All Subjects)
NCERT Books for CBSE Class 12 - Latest Edition
NCERT Solutions for CBSE Class 12 - Updated
NCERT Rationalised Content for Class 12

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Case Study Questions for Class 9 Science Chapter 1 Matter in Our Surroundings

Last modified on: 5 days ago
Reading Time: 6 Minutes

Here we are providing case study questions for class 9 science chapter 12 sound. Students are suggested to go through each and every case study questions for better understanding of the chapter.

Case Study/Passage Based Questions:

Question 1:

Read the following passage and answer the questions given below.

Every matter is made up of tiny particles. These particles are so tiny that they can’t be seen with naked eyes.

The three characteristics shown by particles of matter are as follows:

(i) There are small voids between particles in a matter. This characteristic is the concept behind the solubility of a substance in other substances.

(ii) Particles of matter show continuous random movements, that is they possess kinetic energy. The spreading of ink in a beaker of glass, smell of agarbattis, etc. are few illustrations that show the movement of particles of a substance.

(iii) The particles of matter attract each other with a force called interparticle force of attraction. Read the given passage carefully and give the answer of the following questions:

Q 1. Spreading of fragrance of a burning incense stick in a room shows that:

a. particles of matter have spaces between them.

b. particles of matter attract each other.

c. particles of matter are constantly moving.

d. None of the above

Q 2. What happens when we add sugar to water?

a. Volume of water doubles.

b. Volume of water decreases

c. Volume of water remains the same.

Q 3. A stream of water cannot be cut by fingers. Which property of matter does this observation show?

a. Particles of matter attract each other.

b. Particles of matter have spaces between them.

c. Particles of matter are continuously moving.

Q 4. When we put some crystals of potassium permanganate in a beaker containing water, we observe that after some time, the whole water turns pink. This intermixing of particles of two different types of matter on their own is called:

a. Brownian motion

c. sublimation

d. diffusion

Q 5. Why is the rate of diffusion of liquids higher than that of solids?

a. In the liquid state, particles are tightly packed as compared to solids.

b. In the liquid state, particles move freely as compared to solids.

c. In solid state, particles have least force of attraction between the particles.

d. In solid state, particles cannot be compressed easily.

(c) particles of matter are constantly moving.
(c) Volume of water remains the same.
(a) Particles of matter attract each other.
(d) diffusion
(b) In the liquid state, particles move freely as compared to solids

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Case Study Class 10 Science Questions and Answers (Download PDF)
Accurate answers of all the Case-based questions given in the PDF. Case Study class 10 Science solutions are prepared by subject experts referring to the CBSE Syllabus of class 10. Free to download in Portable Document Format (PDF) so that students can study without having access to the internet.
CBSE Class 10 Science Chapter Wise Important Case Study Questions
As mentioned above, Case Based Questions will carry a total of 12 marks i.e about 15 percent of the total CBSE Class 10 Science marks will come from the Case Study Based Question.
Case Study Questions Class 10 Science
Sample Papers with Case Study Questions. Class 10 Science Sample Papers with case study questions are available in the myCBSEguide App. There are 4 such questions (Q.No.17 to 20) in the CBSE model question paper. If you analyze the format, you will find that the MCQs are very easy to answer. So, we suggest you, read the given paragraph ...
Important Case Study Questions for CBSE Class 10 Science Exam 2024 with
The CBSE Class 10 Science Question Bank on Case Studies, provided in this article, can be very helpful for understanding how the source based or case based questions are asked in the board exam.
Class 10 Science Case Study Questions PDF Download
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Case Study and Passage Based Questions for Class 10 Science Chapter 1
In CBSE Class 10 Science Paper, Students will have to answer some questions based on Assertion and Reason. There will be a few questions based on case studies and passage based as well. In that, a paragraph will be given, and then the MCQ questions based on it will be asked. Here, we have provided … Continue reading Case Study and Passage Based Questions for Class 10 Science Chapter 1 ...
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CBSE Class 10 Science Case Study Questions
Physics Chapters for Case Study Questions. Light - Reflection and Refraction. The Human Eye and The Colourful World. Electricity. Magnetic Effects of Electric Current. TopperLearning provides a complete collection of case studies for CBSE Class 10 Science students. Improve your understanding of biological concepts and develop problem-solving ...
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CBSE 10th Standard Science Subject Case Study Questions. Redox reactions are those reactions in which oxidation and reduction occur Simultaneously. A redox reaction is made up of two half reactions. In the first half reaction, oxidation takes place and in second half reaction, reduction occurs. Oxidation is a process in which a substance loses ...
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CBSE Case Study Questions Class 10 Science Our Environment. Case Study - 1. 1.) Waste management is essential in today's society. Due to an increase in population, the generation of waste is getting doubled day by day. Moreover, the increase in waste is affecting the lives of many people.
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At Case Study Questions there will given a Paragraph. In where some Important Questions will made on that respective Case Based Study. There will various types of marks will given 1 marks, 2 marks, 3 marks, 4 marks. Case study 1. As we know that, the ciliary muscles are responsible for change in focal length of the eye lens.
Case Study Question for Class 10 Science (CBSE Board)
Case Study Question Class 10 Science for CBSE Board: Understudies can discover the chapter astute vital questions for course 10th Science within the table underneath. These imperative questions incorporate questions that are regularly inquired in a long time. Moreover, arrangements are to give for these questions, with extraordinary ...
Case Study and Passage Based Questions for Class 10 Science Chapter 6
In CBSE Class 10 Science Paper, Students will have to answer some questions based on Assertion and Reason. There will be a few questions based on case studies and passage based as well. In that, a paragraph will be given, and then the MCQ questions based on it will be asked. Here, we have provided case … Continue reading Case Study and Passage Based Questions for Class 10 Science Chapter 6 ...
Case Study Questions Class 10 Science Chapter 2 Acids ...
CBSE Board Exam is on the way, so you must practice some good Case Study Questions Class 10 Science to boost your preparation to score 95+% on Boards. In this post, you will get Case Study and Passage Based Questions that will come in CBSE Class 10 Science Board Exams.
Case Study and Passage Based Questions for Class 10 Science Chapter 10
In CBSE Class 10 Science Paper, Students will have to answer some questions based on Assertion and Reason. There will be a few questions based on case studies and passage based as well. In that, a paragraph will be given, and then the MCQ questions based on it will be asked. Here, we have provided case … Continue reading Case Study and Passage Based Questions for Class 10 Science Chapter 10 ...
Important CBSE Class 10 Case Study Based Questions 2024: Top 5
Check the CBSE 10th Science paper pattern designed from the 2024 sample papers to show the placement and importance of case study or source-based questions. Section A 20 objective-type questions ...
CBSE Class 10 Chemistry Notes
Case Studies in Designing Systems; Complete System Design Tutorial; Software Design Patterns. ... Check CBSE Class 10 Science Notes for Chapter 5 - Periodic Classification of Elements for quick revision before Board Exam 2021. ... 30 Day CBSE Class 12th Study Plan and Weekly Routine to Get 90+ in CBSE Board Exam 2024
Case Study and Passage Based Questions for Class 10 Science Chapter 4
In CBSE Class 10 Science Paper, Students will have to answer some questions based on Assertion and Reason. There will be a few questions based on case studies and passage based as well. In that, a paragraph will be given, and then the MCQ questions based on it will be asked. Here, we have provided case … Continue reading Case Study and Passage Based Questions for Class 10 Science Chapter 4 ...
CBSE Organises Science Challenge Programme For Students Of Classes 8 To 10
The CBSE Science Challenge comprises two rounds: an intra-school competition and an inter-school challenge. The challenge paper will include multiple-choice questions, with a focus on both speed ...
Case Study Questions Class 10 Science
CBSE Case Based Questions Class 10 Science Chemistry Chapter 6. CASE STUDY : 1. Carbon and energy requirements of the autotrophic organism are fulfilled by photosynthesis. It is the process by which autotrophs take in substances from the outside and convert them into stored forms of energy. This material is taken in the form of carbon dioxide ...
CBSE Class 10 Science Syllabus 2024-25: Download PDF
To view the list of experiments and prescribed guidelines, download the full practical syllabus below: CBSE Class 10 Science Practical Syllabus 2024-25 PDF. CBSE Class 10 Science Internal ...
Category: Case Study Questions for Class 10 Science
Case Study and Passage Based Questions for Class 10 Science Chapter 1 Chemical Reactions and Equations. Editable Study Materials for Your Institute - CBSE, ICSE, State Boards (Maharashtra & Karnataka), JEE, NEET, FOUNDATION, OLYMPIADS, PPTs.
CBSE Board Class 10th and 12th Result 2024: CBSE Board Likely to
Expectations are high for the announcement of CBSE Class 10 and 12 results 2024, set to be disclosed on the official websites (cbse.nic.in and cbse.gov.in). Results for Class 12, covering Science, Commerce, and Arts streams, will be released together.
Case Study Questions Class 10 Science Acids, Bases and Salts
CBSE Case Study Questions Class 10 Science Acids, Bases and Salts CASE STUDY : 1. The reaction between carbon dioxide and calcium hydroxide (lime water), Calcium hydroxide, which is a base, reacts with carbon dioxide to produce a salt and water. Since this is similar to the reaction between a base and an acid, we can conclude that nonmetallic ...
CBSE Class 12 Geography Syllabus 2024-25: Download PDF
Till Class 10, this subject is taught under Social Science, which becomes an independent subject in Class 11. Students of the humanities generally study this subject in Classes 11 and 12.
Case Study Questions for Class 9 Science Chapter 1 Matter in Our
Board CBSE Useful for Class 9 Students Subject Science Chapter Chapter 1 Matter in Our Surroundings Question Type Case Study Questions No. of Questions 1 With Answers Yes Important Link Class 9 Chapterwise Case Study Case Study Questions for Class 9 Science Chapter 1 Matter in Our Surroundings Here we are providing case study questions … Continue reading Case Study Questions for Class 9 ...

Case Study Class 10 Science Questions and Answers (Download PDF)

Case Study Class 10 Science

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Case Study Questions Class 10 Science Acids, Bases and Salts

CBSE Case Study Questions Class 10 Science Acids, Bases and Salts

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