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class 10 chemistry holiday homework

Holiday Homework Solutions for class 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 & 12 (During Summer Vacations) facility for the academic session 2022–2023 is being maintained to help the students and parents to do the holiday homework comfortably in Summer 2024-25. You are requested to upload your holiday homework in PDF format based on Latest CBSE Curriculum 2024-25 and get the solutions with in a week. You can also ask your Maths or science problems through Discussion Forum. If the problems are related to NCERT or NCERT Exemplar Problems please refer to NCERT Solutions page to get this. The solutions of holiday homework should be uploaded along with the school name at the end of this page. Notification of completion of homework will not be given by the website, you have to check yourself after a week for the solutions.

Download NCERT Solutions for all classes. Students of the upper primary level (Class 6, 7 and 8) are already well informed and are keen to find and learn more. According to CBSE, while assigning and preparing homework for the students, it is important to note they are able to develop the skills like relating, thinking, concluding, inferring. Homework should be such that the student neither feel it burdensome nor they lose interest in the subject matter. Moreover it is useful in providing them a happy experience. Homework therefore needs to be thought about and worked upon differently. Emphasis should be given on Vedic mathematics, designing quality homework rather than its quantity. Download NCERT Books and apps based on latest CBSE Syllabus.

Encompassing the aforesaid ideas, the CBSE has brought forth a Manual, “Alternatives to Holiday Homework” for classes VI to VIII. It is collection of ideas transformed into suggestive activities that are creative, interesting, meaningful and interactive, enhancing various skills, directly or indirectly related to subject matter providing students to enhance their learning and gaining knowledge based on NCERT Books following the latest CBSE Syllabus.

Suggestive Holiday Homework for Class 6

  • Holiday Homework for Class 6 Hindi
  • Holiday Homework for Class 6 English
  • Holiday Homework for Class 6 Mathemaitcs
  • Holiday Homework for Class 6 Science
  • Holiday Homework for Class 6 Social Science

Suggestive Holiday Homework for Class 7

  • Holiday Homework for Class 7 Hindi
  • Holiday Homework for Class 7 English
  • Holiday Homework for Class 7 Mathematics
  • Holiday Homework for Class 7 Science
  • Holiday Homework for Class 7 Social Science

Suggestive Holiday Homework for Class 8

  • Holiday Homework for Class 8 Hindi
  • Holiday Homework for Class 8 English
  • Holiday Homework for Class 8 Mathematics
  • Holiday Homework for Class 8 Science
  • Holiday Homework for Class 8 Social Science

A well rounded development of individual knowledge happens not only from textbooks and formal education but more from the learner’s personal experiences, individual inquisitive nature and social surroundings. Homework is an area of importance and to make it more relevant for the NCERT Books classes 6th, 7th and 8th, appropriate strategies and meaningful activities may be suggested to the schools that give more time to child to explore the environment to develop creative thinking.

These activities (like OTBA for class 9 & 11 ) would be so framed that they keep the child interested in subjects and therefore would also help in enhancing the learning power. Homework is one of the areas that need urgent attention. As the students of class VI, VII and VIII develop a certain learning style and want to know and find more and more. Efforts should be made to make homework more creative and interesting so that the students do not feel burdensome while doing the same and the ultimate purpose of providing homework is served.

A survey was conducted through questionnaire prepared by CBSE to collect feedback from parents, teachers, students and other educationists on “Alternatives to Homework at Upper Primary Level” for Class Sixth, Seventh and Eighth so that appropriate strategies and meaningful activities can be designed and suggested to schools. The questions were directed to know the ideal quantity and purpose of the homework, whether homework should be assigned in all the subjects, internet usage should be a part of the homework or not, how homework helps in teaching.

Keeping in view emerging issues, there is a need to think about giving quality homework emphasizing on acquiring applied learning skills. Few points can be kept in mind while designing a quality homework by teachers: 1, Provide students capacity building activities which are followed up and acknowledged like drawing, creative writing, making puzzles, stories, plays, online games, reading online books and craft.

2. Provide them assignment sheets which improve their reading & writing abilities. Homework must enable the student to practice a skill independently. 3. A possible discussion can be held with different children on what they would like to do at home to improve in which ever area they deem necessary. Homework must be designed in a way that maximizes the chances of its completion by the students.

4. Parents should be able to understand the child’s needs and schools suggestions on how to learn mathematics, logical reasoning, etc. by doing puzzles, writing letters, reading to elders from the newspapers, making household lists, recipe making and cooking. 5. Learners who have dyslexia or number difficulty should have practice assignments overcoming their problems.

The child in middle school have a keenness to discover more and prepare for the examination. Learning is about developing new faculties, which become useful as an adult. The years 12 to 15 are years when rules become important, and doing well, excelling are given importance both at home and in the class. As the child grows chronically his/her emotional maturity also grows and there are interests which are beyond just what lessons can give.

The homework assigned should: 1. enhance study habits and practice skills (which learners are able to perform independently) 2. reinforce necessary skills both scholastic and co-scholastic among the learners. 3. enable learners to become independent learners and thinkers and develop among them 21st century skills so that they can participate in Make in India in future. 4. lead to the improvement in the academic achievement of the learner.

5. expand on the existing knowledge of the learners and be a part of the already acquired competencies in the classroom. 6. not put unneeded pressure or stress by including new learning material or difficult material to be worked upon by learners themselves. 7. be CBSE Syllabus based and as per developmental needs of the learners. 8. not require specific resources or technology which is not accessible to all learners. 9. have clearly defined, purposeful, creative and engaging activities.

It is also advised that teachers can refer to Life Skills Manuals, Health Manuals and Environmental Education Manuals which contain age appropriate and interesting activities which can be taken up by the learners individually. These activities can be assigned to learners so as to enhance their life skills, values and make them health conscious.

Homework is needed, and necessary for a teacher to be able to follow up with each child. The correction and feedback on homework is an important input that helps both parents and children to follow up and improve in areas which are needed. The recourse extra classes, can be reduced if the homework is used for learning improvement and acquisition of diverse skills. We are providing a handful help to solve or helping in solving the holiday homework.

What are concepts of the Holiday Homework for Class 1, 2, 3, 4 and 5?

The Holiday Homework 2024-25 for class 1 and Class 2 should be totally creative work only. We should prepare the homework in such a way that student enjoy the work like play. The holiday assignment for class 3, 4 and Class 5 should be totally creative work.

What are the Holiday Homework suggestions for Class 6, 7 and 8?

The ideas for Holiday Homework 2024-25 for class 6, 7 and 8 Maths, Science, English, Hindi and Social Science are given on Tiwari Academy. We should also include the interesting facts related to daily life with the topic of NCERT Books.

How to prepare the Holiday Homework 2024-25 for class 9 and 10?

The collection of Important Questions from NCERT Textbook, From board Papers, CBSE Sample papers and NCERT Exemplar Books may be the good holiday homework practice material for High School students.

What would be good the Holiday Homework for class 11 and 12?

The Holiday Homework for class 11 and 12 are generally selected as the NCERT Textbook topics. The NCERT Books back exercises and related questions which are asked in CBSE Board Examination may be a good assignment for intermediate students.

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Download CBSE Class 10 Summer Season Holiday Homework 2024-25 Session in PDF

CBSE Class 10 Summer Season Holiday Homework

CBSE Class 10 Summer Season Holiday Homework: Hello, students; thanks for reaching out here; in this article, you will get complete details of Class 10th Summer Season Holiday homework. You will get homework in PDF format; take a printout of these resources.

Before delving into the Class 10 Summer Season Holiday Homework, let’s review the CBSE Class 10 Summary:

Class 10 Summer Season Holiday Homework

Below, we have mentioned the updated CBSE Class 10 Summer Season Holiday Homework in PDF. Students can download the complete Subject CBSE Class 10 Summer Season Holiday Homework in PDF Format for practice.

Class 10 NCERT Solution

Here are the NCERT Solutions provided below. Students have reviewed the comprehensive NCERT Solutions in PDF format to achieve excellent scores in their final examinations.

CBSE Class 10 Sample Paper

This section mentioned the Model Test paper specially made for CBSE Class 10. Try to solve it within the prescribed time limit.

CBSE Class 10 Syllabus 2024-25

Check out the latest Syllabus for Class 10. The syllabus is for the 2024-25 academic year session and will remain the same until the following notification.

Class 10 Worksheet

In this section, we have only mentioned the CBSE Class 10 worksheet in PDF Format for practice purposes. Parents /guardians can check and download the worksheet to prepare their students better.

You Should Also Checkout

  • [Updated] CBSE Class 10 Hindi NCERT Books 2024-25 Session in PDF
  • [Not Released Yet] CBSE Class 10 Hindi Syllabus For New Academic Session 2024-25: Download in PDF
  • [Updated March’24] CBSE Class 10 NCERT Books 2024-25 Session in PDF
  • [Syllabus Changed] CBSE Class 10 Syllabus For New Academic Session 2024-25 in PDF

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Holiday Homework

Holiday homework for pre-primary classes, holiday homework for primary classes, holiday homework for middle & senior classes.

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NCERT Books, Solutions, CBSE Online, Guide, Syllabus, Sample Paper

Summer Vacation Holiday Homework for Class 10

Holiday homework for summer vacation class 10 2023 – 2024, summer vacation holiday homework for class 10 2022-2023.

class 10 chemistry holiday homework

Summer Vacation Holiday Homework for Class 10 2020-2021

Summer Vacation Holiday Homework for Class 10

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  • NCERT Solutions
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  • Chapter 1 Chemical Reactions And Equation

NCERT Solutions for Class 10 Science Chapter 1 Chemical Reactions and Equations

Ncert solutions for class 10 science chapter 1 – cbse download free pdf.

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Download Exclusively Curated Chapter Notes for Class 10 Science Chapter – 1 Chemical Reactions and Equations

Download most important questions for class 10 science chapter – 1 chemical reactions and equations.

Chapter 1 of NCERT Solutions for Class 10 Science mainly deals with writing chemical equations and writing and balancing chemical equations. Also, in this chapter, students learn the basics of chemical reactions, their types and the effects of a chemical oxidation reaction in our daily lives. The NCERT Solutions Class 10 Science Chapter 1 provides an overview of the main concepts in the chapter and help them to get well-versed in important topics such as writing chemical equations and balancing them.

The NCERT Solutions for Class 10 Science Chapter 1 have good weightage, and there will be around 4 questions asked from this chapter every year. The types of questions that appear in this chapter are mostly practice-based questions. Thorough knowledge and good practice will help learners score full marks on the questions asked in this chapter.

  • Chapter 2 Acids, Bases and Salts
  • Chapter 3 Metals and Non-metals
  • Chapter 4 Carbon and Its Compounds
  • Chapter 5 Periodic Classification of Elements
  • Chapter 6 Life Processes
  • Chapter 7 Control and Coordination
  • Chapter 8 How Do Organisms Reproduce?
  • Chapter 9 Heredity and Evolution
  • Chapter 10 Light Reflection and Refraction
  • Chapter 11 The Human Eye and Colourful World
  • Chapter 12 Electricity
  • Chapter 13 Magnetic Effects of Electric Current
  • Chapter 14 Sources of Energy
  • Chapter 15 Our Environment
  • Chapter 16 Management of Natural Resources

NCERT Solutions for Class 10 Science Chapter

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NCERT Solutions for Class 10 Science Chapters

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Access answers to NCERT Class 10 Science Chapter 1 – Chemical Reactions and Equations

In-text questions set 1 Page number – 6

1. Why should a magnesium ribbon be cleaned before burning in the air?

Magnesium ribbon should be cleaned before burning in air because Magnesium metal reacts with the atmospheric oxygen and forms Magnesium Oxide (MgO) layer which is a very stable compound. In order to prevent further reactions with Oxygen, it is therefore necessary to clean the ribbon by to remove the layer of MgO.

2. Write a balanced equation for the following chemical reactions.

i) Hydrogen + Chloride —-> Hydrogen chloride

ii) Barium chloride + Aluminium sulphate —-> Barium sulphate + Aluminium chloride

iii) Sodium + Water —-> Sodium hydroxide + Hydrogen

i) H 2 + Cl 2 → 2HCl

ii) 3BaCl 2 + Al 2 (SO 4 ) 3 →3BaSO 4  + 2AlCl 3 

iii) 2Na + 2H 2 O → 2NaOH + H 2

3. Write a balanced chemical equation with state symbols for the following reactions

i) Solutions of Barium chloride and Sodium sulphate in water react to give insoluble Barium sulphate and solution of Sodium chloride.

ii) Sodium hydroxide solution in water reacts with the hydrochloric acid solution to produce Sodium chloride solution and water.

i) BaCl 2 + Na 2 SO 4 → BaSO 4 + 2NaCl

ii) NaOH + HCl → NaCl + H 2 O

In-text questions set 2 Page number – 10

1. A solution of a substance, ‘X,’ is used for whitewashing.

(i) Name the substance ‘X’ and write its formula.

(ii) Write the reaction of the substance ‘X’ named in (i) above with water.

i) The substance ‘X’ which is used in whitewashing is quick lime or Calcium Oxide and its formula is CaO .

ii) CaO + H 2 O → Ca(OH) 2

2. Why is the amount of gas collected in one of the test tubes in Activity 1.7 double the amount collected in the other? Name this gas.

In activity 1.7, gas collected in one of the test tubes is double of the amount collected in the other because water gets hydrolysed to release H 2 and O 2 gas. Here, after electrolysis two molecules of Hydrogen and one molecule of oxygen gas are released; hence, the amount of Hydrogen collected would be double than that of oxygen.

In-text questions set 3 Page number – 13

1. Why does the colour of copper sulphate solution change when an iron nail is dipped in it?

When an iron nail is dipped in the copper sulphate solution, iron displaces copper from the copper sulphate because iron is more reactive than copper. Therefore, the colour of the copper sulphate solution changes. The reaction is

Fe + CuSO 4 → FeSO 4 + Cu

2.  Give an example of a double displacement reaction other than the one given in Activity 1.10.

  Solution:

Reaction Between silver nitrate (AgNO 3 ) and Sodium chloride (NaCl) is an example of a double displacement reaction. During the reaction, negative and positive ions trade positions as a result of the formation of white silver chloride precipitate. The chemical reaction is given below.

Ag + + NO 3 – + Na + + Cl –  → AgCl + Na + + NO 3 –

3. Identify the substances that are oxidised and that are reduced in the following equation.

i) 4Na(s) + O 2 (g) → 2Na 2 O(s)

ii) CuO(s) + H 2 (g) → Cu(s) + H 2 O(l)

The Sodium (Na) in the first equation is getting oxidized with the addition of Oxygen (O 2 ), and the Copper (Cu) in the second equation is reduced due to the addition of Hydrogen (H 2 ).

Exercise Questions Page number – 14-16

1. Which of the statements about the reaction below are incorrect?

2PbO(s) + C(s) → 2Pb(s) + CO 2 (g)

(a) Lead is getting reduced

(b) Carbon Dioxide is getting oxidised

(c) Carbon is getting oxidised

(d) Lead oxide is getting reduced

       (i) (a) and (b)

       (ii) (a) and (c)

       (iii) (a), (b) and (c)

       (iv) all the above

(i) (a) and (b)

Explanation: (a) Because Oxygen is being removed and (b) Because the removed oxygen from Lead is added to the elemental Carbon.

class 10 chemistry holiday homework

2.  Fe 2 O 3 + 2Al → Al 2 O 3 + 2Fe

The above reaction is an example of a

  • Combination reaction

Double displacement reaction

  • Decomposition reaction

Displacement reaction

The answer is 4. Displacement reaction.

Explanation: The Oxygen from the Ferrous oxide is getting displaced to the Aluminium metal to form Aluminium Oxide. In this reaction, Aluminum is a more reactive metal than Fe. Therefore, Al will displace Fe from its oxide. This type of chemical reaction, called displacement reaction, is in which one of the elements displaces another. Here, less reactive metal is displaced by more reactive metal. Since one-time displacement is occurring, it is called a single displacement reaction.

class 10 chemistry holiday homework

3. What happens when dilute hydrochloric acid is added to iron fillings? Tick the correct answer.

  • Hydrogen gas and Iron chloride are produced.
  • Chlorine gas and Iron hydroxide are produced.
  • No reaction takes place.
  • Iron salt and water are produced.

Explanation: The Chlorine from Hydrogen chloride is displaced by the Iron fillings to undergo the following reaction.

2HCl + Fe → FeCl 2 + H 2

class 10 chemistry holiday homework

4. What is a balanced chemical equation? Why should a chemical equation be balanced?

A balanced equation is the one in which number of different atoms on both the reactant and product sides are equal. Balancing chemical equations is necessary for the reaction should obey The Law of Conservation of mass. Balancing the chemical equation has no defined method and is purely a trial-and-error attempt.

class 10 chemistry holiday homework

5.  Translate the following statements into chemical equations and balance them.

(a) Hydrogen gas combines with nitrogen to form ammonia.

(b) Hydrogen sulphide gas burns in the air to give water and sulphur dioxide.

(c) Barium chloride reacts with aluminium sulphate to give Aluminium chloride and a precipitate of barium sulphate.

(d) Potassium metal reacts with water to give potassium hydroxide and Hydrogen gas.

(a) Unbalanced: H 2 + N 2 → NH 3

Balanced: 3H 2 + N 2 → 2NH 3

class 10 chemistry holiday homework

(b) Unbalanced: H 2 S + O 2 → H 2 O + SO 2

Balanced: 2H 2 S + 3O 2 → 2H 2 O + 2SO 2

class 10 chemistry holiday homework

(c)  Unbalanced:

BaCl 2 + Al 2 (SO 4 ) 3 → AlCl 3 + BaSO 4

Balanced: 3BaCl 2 + Al 2 (SO 4 ) 3 → 2AlCl 3 + 3BaSO 4

class 10 chemistry holiday homework

(d) Unbalanced: K + H 2 O → KOH + H 2

Balanced:  2K + 2H 2 O → 2KOH + H 2

class 10 chemistry holiday homework

6. Balance the following chemical equations.

(a) HNO 3 + Ca(OH) 2 → Ca(NO 3 ) 2 + H 2 O

(b) NaOH + H 2 SO 4 → Na 2 SO 4 + H 2 O

(c) NaCl + AgNO 3 → AgCl + NaNO 3

(d) BaCl 2 + H 2 SO 4 → BaSO 4 + HCl

(a) 2HNO 3 + Ca(OH) 2 → Ca(NO 3 ) 2 + 2H 2 O

class 10 chemistry holiday homework

(b) 2NaOH + H 2 SO 4 → Na 2 SO 4 + 2H 2 O

class 10 chemistry holiday homework

(d) BaCl 2 + H 2 SO 4 → BaSO 4 + 2HCl

class 10 chemistry holiday homework

7. Write the balanced chemical equation for the following reactions.

Calcium hydroxide + Carbon dioxide —-> Calcium carbonate + Water

Zinc + Silver nitrate —-> Zinc nitrate + Silver

Aluminium + Copper chloride —-> Aluminium chloride + Copper

Barium chloride + Potassium sulphate —-> Barium sulphate + Potassium chloride

2Ca(OH) 2 + 2CO 2 → 2CaCO 3 + 2H 2 O

class 10 chemistry holiday homework

Zn + 2AgNO 3 → Zn(NO 3 ) 2 + 2Ag

class 10 chemistry holiday homework

2Al + 3CuCl 2  → 2AlCl 3 + 3Cu

class 10 chemistry holiday homework

BaCl 2 + K 2 SO 4 → BaSO 4 + 2KCl

class 10 chemistry holiday homework

8. Write a balanced chemical equation for the following and identify the type of reaction of each case.

KBr + BaI 2 → KI + BaBr 2

ZnCO 3 → ZnO + CO 2

H 2 + Cl → HCl

Mg + HCl → MgCl 2 + H 2

2KBr + BaI 2 → 2KI + BaBr 2 (Double Displacement Reaction)

class 10 chemistry holiday homework

ZnCO 3 → ZnO + CO 2 (Decomposition Reaction)

class 10 chemistry holiday homework

H 2 + Cl → 2HCl (Combination Reaction)

class 10 chemistry holiday homework

Mg + 2HCl → MgCl 2 + H 2 (Displacement Reaction)

class 10 chemistry holiday homework

9. What is meant by exothermic and endothermic reactions? Give examples.

An endothermic reaction occurs when energy is absorbed from the surroundings in the form of heat (For example, Photosynthesis, melting of ice, evaporation). Conversely, an exothermic reaction is one in which energy is released from the system into the surroundings (Examples: Explosions, concrete setting, nuclear fission and fusion).

class 10 chemistry holiday homework

10. Why is respiration considered to be an exothermic reaction?

For the survival of life, we require energy. We obtain this energy from the food we eat. The food molecules, through the process of digestion, is broken down into simpler molecule like glucose. These substances come in contact with the Oxygen present in our body cells to form Carbon dioxide and water along with a certain amount of energy (Respiration process). Since the energy is in the form of heat (that maintains our body temperature), respiration is considered to be an exothermic reaction. The reaction taking place is:

C 6 H 12 O 6 + 6O 2 → 6CO 2 + 6H 2 O + Energy

class 10 chemistry holiday homework

11. Why are decomposition reactions called the opposite of Combination reactions? Write equations for decomposition reactions.

Combination reaction is said to be the reaction between two or more molecules to form a larger molecule; whereas the decomposition reaction is defined as the splitting of larger molecules into two or more smaller molecules. This essentially explains that the decomposition reaction is the opposite of the combination reaction.

In most cases, the decomposition reaction is endothermic since the heat from the surrounding or induced heat is used to break the bonds of the larger molecule. A few examples of decomposition reactions are

CaCO 3 + Energy → CaO + CO 2

2HgO → 2Hg + O 2

class 10 chemistry holiday homework

12. Write one equation each for decomposition reactions in which energy is supplied in the form of heat, light or electricity.

(a) Thermal decomposition reaction (Thermolysis)

Decomposition of potassium chlorate: When heated strongly, potassium chlorate decomposes into potassium chloride and oxygen. This reaction is used for the preparation of oxygen.

2KClO 3 + Heat → 2KCl + 3O 2

(b) Electrolytic decomposition reaction (Electrolysis)

Decomposition of sodium chloride: On passing electricity through molten sodium chloride, it decomposes into sodium and chlorine.

NCERT Solution Class 10 Science Chapter 1-1

(c) Photodecomposition reaction (Photolysis)

Decomposition of hydrogen peroxide: In the presence of light, hydrogen peroxide decomposes into water and oxygen.

NCERT Solution Class 10 Science Chapter 1-2

13.  What is the difference between displacement and double displacement reactions? Write relevant equations for the above.

A displacement reaction is one when a more reactive substance displaces a less reactive one from its salt solution, whereas a double displacement reaction is one where a mutual exchange of ions happens between two compounds.

In a displacement reaction, only a single displacement takes place, whereas in the double displacement reaction, as the name suggests, two displacement takes place between the molecules.

Mg + 2HCl → MgCl 2 + H 2

2KBr + BaI 2 → 2KI + BaBr 2

class 10 chemistry holiday homework

14. In the refining of Silver, the recovery of silver from Silver nitrate solution involves displacement reaction by Copper metal. Write down the reaction involved.

Cu(s) + 2AgNO 3 (aq) → Cu(NO 3 ) 2 (aq) + 2Ag(s)

class 10 chemistry holiday homework

15. What do you mean by a precipitation reaction? Explain by giving examples.

When two solutions containing soluble salts are combined, a double displacement reaction takes place in which the ions are exchanged between the compounds. When one of such compounds formed is in solid form (that is insoluble in aqua), then it settles down at the bottom of the container. This solid is known as the precipitate and the respective reaction is termed as the precipitation reaction. A few examples of precipitation reactions are

CdSO 4 (aq) + K 2 S(aq) → CdS(s) + K 2 SO 4 (aq)

2NaOH(aq) + MgCl 2 (aq) → 2NaCl(aq) + Mg(OH) 2 (s)

class 10 chemistry holiday homework

16. Explain the following in terms of the gain of oxygen with two examples each.

(a) Oxidation

(b) Reduction

(a) In a chemical reaction, when the oxygen is added to the element to form its respective oxide it is the element being oxidised. Example:

4Na(s) + O 2 (g) → 2Na 2 O(s)

H 2 S + O 2 → H 2 O + SO 2

class 10 chemistry holiday homework

(b) In a chemical reaction, when the oxygen is removed from the compound, then it is said to be reduced. Example:

CuO(s) + H 2 (g) → Cu(s) + H 2 O(l)

class 10 chemistry holiday homework

17. A shiny brown coloured element ‘X’ on heating in the air becomes black in colour. Name the element ‘X’ and the black-coloured compound formed.

The shiny brown-coloured element is Copper metal (Cu). When the metal is heated in air, it reacts with atmospheric oxygen to form copper oxide. Hence, the black-coloured compound is copper oxide.

2Cu(s) + O 2 (g) → 2CuO(s)

class 10 chemistry holiday homework

18) Why do we apply paint on iron articles?

Iron articles are painted to prevent them from rusting. When left unpainted, the metal surface comes in contact with the atmospheric oxygen and in the presence of moisture it from Iron(III) oxide. But if painted, the surface does not come in contact with moisture and air, thus prevents Rusting.

class 10 chemistry holiday homework

19) Oil and Fat containing food items are flushed with Nitrogen. Why?

The main purpose of flushing Nitrogen into food packets that contain oil and fat items is to prevent Rancidity which occurs when the oil or fat reacts with the oxygen letting out an unpleasant smell and taste. Therefore, by flushing Nitrogen, an unreactive surrounding is created, thus preventing rancidity.

class 10 chemistry holiday homework

20) Explain the following terms with one example each.

(a) Corrosion

(b) Rancidity

(a) Corrosion is a process where a refined metal is oxidised by atmospheric oxygen to form a more stable compound, such as oxides. The metal gradually degrades during the corrosion process. Rusting of iron is a good example of corrosion where the iron is converted to Iron oxide. Millions of dollars are spent annually in preventing rusting from bridges and other monuments.

class 10 chemistry holiday homework

(b) The condition produced by the aerial oxidation of the oil and fat present in the food material that produces an unpleasant taste and smell. The rancidity is retarded when the food is kept inside the refrigerator since the low temperature does not promote the oxidation reaction.

class 10 chemistry holiday homework

Topics Covered under Class 10 Chapter 1 Science Chemical Reactions and Equations

Chemical Reactions and equations is a very fundamental chapter that deals with basic knowledge of chemical reactions and equations. Students are advised to get tuned in with this chapter to avoid any sort of difficulty in understanding advanced topics of chemistry. If you are planning to take science in your higher secondary school, this is one of the important chapters you have to memorise for a very long period of time.

Features of NCERT Solutions for Class 10 Chapter 1 Science Chemical Reactions and Equations

  • Students can get comprehensive practice in balancing different kinds of equations.
  • NCERT Solutions will help students write different chemical equations appropriately
  • Help them get a thorough practice of solving questions of varied difficulty before facing the CBSE examination.

A chemical reaction is an important phenomenon in our lives. We come across various chemical reactions like rusting of iron, curdling of milk, respiration, digestion and growth. In order to score good marks in the CBSE Class 10 examination, students must practise the NCERT Solution for Class 10 Science Chapter 1 provided here.

At BYJU’S, students get free NCERT Solutions for all the classes, subjects and chapters. To help them with CBSE exam preparation, BYJU’S also provides NCERT notes, videos, animations, previous years’ question papers, sample papers, NCERT exemplar solutions and textbooks.

To get access to all the resource material provided by us, students should register with BYJU’S site or download BYJU’S – The Learning App.

Frequently Asked Questions on NCERT Solutions for Class 10 Science Chapter 1

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Assignment/ Holiday Homework

Assignment schedule primary wing (2022-23).

ASSIGNMENT:

April to May 2018-19

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  1. 1 3 AP Chemistry Homework

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  2. Class 10 Chemistry Worksheet on Chapter 1 Chemical Reactions and

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  1. Metals & Non Metals Complete Chapter In 13 Minutes

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  1. PDF Class 10 Holiday Homework Chemistry

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  7. NCERT Solutions for Class 10 Science Chapter 1 Chemical Reactions

    Page Number: 10. Question 1. A solution of a substance 'X' is used for white washing. (i) Name the substance 'X' and write its formula. (ii) Write the reaction of the substance 'X' named in (i) above with water. Answer: (i) The substance whose solution in water is used for white washing is calcium oxide (or quick lime). Its formula ...

  8. CBSE Class 10 Summer Season Holiday Homework [Updated]

    Download CBSE Class 10 Summer Season Holiday Homework 2024-25 Session in PDF. CBSE Class 10 Summer Season Holiday Homework: Hello, students; thanks for reaching out here; in this article, you will get complete details of Class 10th Summer Season Holiday homework. You will get homework in PDF format; take a printout of these resources.

  9. NCERT Solutions for Class 10 Science Updated for 2023-24 Exam

    Chapter 1 - Chemical Reactions and Equations. The first chapter of Class 10 NCERT Science will teach the students about chemical reactions and how to write equations, how to conduct combination and decomposition reactions and more. In the previous classes, we have learned about physical and chemical changes in matter.

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    10. Distinguish between uniform and non uniform motion. CHEMISTRY (1) Prepare a project report on various samples of (a) a mixture, (b) a compound, (c) an element [metal and non-metal], (3 of each category) highlighting the main characteristics features of elements, compounds & mixtures. (2) Prepare a report on 4th & 5th state of matter.

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  17. NCERT Solutions for Class 10 Science Chapter 1 Chemical Reactions and

    Solution: i) BaCl 2 + Na 2 SO 4 → BaSO 4 + 2NaCl. ii) NaOH + HCl → NaCl + H 2 O. In-text questions set 2 Page number - 10. 1. A solution of a substance, 'X,' is used for whitewashing. (i) Name the substance 'X' and write its formula. (ii) Write the reaction of the substance 'X' named in (i) above with water. Solution:

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