Class 10 Science Chapter 1 MCQ (Multiple Choice Questions) of Chemical Reactions and Equations. All the questions are taken from NCERT Textbook, ten years papers, exemplar books, CBSE Sample papers and different popular books for academic session 2024-25. There are 25 sets of MCQ tests containing total of 125 questions with answers and explanation. We have uploaded all the questions carefully. For any error, please take screen shot and send us for modification.

Class 10 Science Chapter 1 MCQ for 2024-25

Class: 10 Science
Contents:Multiple Choice Questions – MCQ Tests

Class 10 Science Chapter 1 MCQ Tests 2024-25

Class 10 Science Chapter 1 MCQ are given below. There total of 5 questions in each test. You can attend more and more test to evaluate your practice. MCQs are now important for CBSE Exams also. Answers and explanation of each question is given just below the questions. If you have any doubt, please ask in discussion forum.

Q1

Which of the following are combination reactions?

[A]. 2KClO3 → 2KCl +3O2, and 4Al +32O → 2Al2O3
[B]. 4Al +32O → 2Al2O3, and Zn + FeSO4 → ZnSO4 + Fe
[C]. Mgo + H2O → Mg(OH)2, and Zn + FeSO4 → ZnSO4 + Fe
[D]. Mgo + H2O → Mg(OH)2, and 4Al +32O → 2Al2O3
Q2

In which of the following statements is or are incorrect?

[A]. When calcium hydroxide solution lime water reacts with carbon dioxide gas a white precipitate of calcium carbonate is formed along with water.
[B]. When zinc metals react with dilute sulphuric acid to form zinc sulphate solution and hydrogen gas.
[C]. During respiration glucose combines with oxygen in the cells of our body to form carbon dioxide and water along with the production of energy.
[D]. The reaction between nitrogen and oxygen to form nitrogen monoxide is an an exothermic reaction.
Q3

In which of the following chemical equations the abbreviations represent the correct states of the reactants and products involved at reaction temperature?

[A]. 2H2(l) +O2(l) → 2H2O (g)
[B]. 2H2(g) +O2(l) → 2H2O (l)
[C]. 2H2(g) +O2(g) → 2H2O (l)
[D]. 2H2(g)+O2(g) → 2H2O(g)
Q4

Which of the following is not a physical change?

[A]. Boiling of water to give water vapour
[B]. Melting of ice to give water
[C]. Dissolution of salt in water
[D]. Combustion of Liquefied Petroleum Gas (LPG)
Q5

The following reaction is used for the preparation of oxygen gas in the laboratory. Which of the following statements (s) is/are correct about the reaction? 2KClO3 (s) + Heat/ Catalyst → 2KCl(s) + 302 (g)

[A]. It is a decomposition reaction and endothermic in nature.
[B]. It is a combination reaction.
[C]. It is a decomposition reaction and accompanied by release of heat.
[D]. It is a photochemical decomposition reaction and exothermic in nature.
Q6

Which of the following gases can be used for storage of fresh sample of an oil for a long time?

[A]. Carbon dioxide or oxygen
[B]. Nitrogen or oxygen
[C]. Carbon dioxide or helium
[D]. Helium or nitrogen
Q7

Which of the following statement is or are incorrect?

[A]. A balanced chemical equation has an equal number of atoms of different elements in the reactants and products.
[B]. Zinc reacts with dilute sulphuric acid to give zinc sulphate and hydrogen.
[C]. An unbalanced chemical equation has an unequal number of atoms of one or more elements in the reactants and products.
[D]. Law of conservation of mass can emphasis that matter can neither be created but destroyed in a chemical reaction.
Q8

In the double displacement reaction between aqueous potassium iodide and aqueous lead nitrate, a yellow precipitate of lead iodide is formed. While performing the activity if lead nitrate is not available, which of the following can be used in place of lead nitrate?

[A]. Lead sulphate (insoluble)
[B]. Lead acetate
[C]. Ammonium nitrate
[D]. Potassium sulphate
Q9

Paheli is writing some statement which is given by her teacher. Would you help him to choose the incorrect statements?

[A]. The combustion reaction of candle wax is characterized by a change in state from solid to liquid and gas.
[B]. When a chemical reaction absorbs heat energy, then the temperature of reaction mixture is falls and it becomes cold.
[C]. When a Zinc metal reacts with dilute sulphuric acid to form zinc sulphate and hydrogen gas.
[D]. None of the above.
Q10

Consider the following statements and choose in which of the given reaction, where heat is absorbed?

[A]. The chemical reaction between quicklime and water to form slaked lime is characterized by a changing in temperature.
[B]. The chemical reaction between zinc granules and dilute sulfuric acid is also characterized by a change in temperature.
[C]. The chemical reaction between barium hydroxide and ammonium chloride to form barium chloride, ammonia and water is characterized by a change in temperature.
[D]. The chemical reaction in which carbon burns in air to form carbon dioxide and energy.
Q11

Boojho appeared in class test where he wrote some statements but he confused to know the correct statement. Would you help him to know that?

[A]. Some chemical reaction and are characterized by a change in colour.
[B]. The purple colour of potassium permanganate solution disappears when citric acid reacts with potassium permanganate solution.
[C]. The orange colour of potassium dichromate solution changes to green when sulphur dioxide gas is passed through acidified potassium dichromate solution.
[D]. All the above.
Q12

Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium chloride. Which of the following correctly represents the type of the reaction involved?

[A]. Displacement reaction
[B]. Precipitation reaction
[C]. Double displacement reaction
[D]. Precipitation reaction, and Double displacement reaction
Q13

In which of the following statements is or are incorrect?

[A]. Some chemical reactions are characterized by the formation of a precipitate.
[B]. A precipitate is a liquid product which separate out from the solution during a chemical reaction.
[C]. Yellow precipitate of lead iodide is formed when potassium iodide solution is added to the solution of lead nitrate.
[D]. A precipitate can also form by passing a gas into an aqueous solution of a substance.
Q14

Solid calcium oxide reacts vigorously with water to form calcium hydroxide accompanied by the liberation of heat. This process is called slaking of lime water. Which among the following is/are true about slaking of lime water and the solution formed?

[A]. It is an endothermic reaction, and It is exothermic reaction.
[B]. It is exothermic reaction, and The pH of the resulting solution will be more than seven.
[C]. It is an endothermic reaction, and The pH of the resulting solution will be less than seven.
[D]. The pH of the resulting solution will be more than seven, and The pH of the resulting solution will be less than seven.
Q15

Consider the given statements and choose the incorrect one:

[A]. The bubbles of hydrogen gas are produced, when zinc granules reacts with dilute sulphuric acid.
[B]. Hydrogen gas is evolved when magnesium reacts with a dilute acid.
[C]. Hydrogen gas is evolved when dilute hydrochloric acid is poured over sodium carbonate.
[D]. None of the above.
Q16

Which among the following (are) double displacement reaction (s)?

[A]. Pb + CuCl2 → PbCl2 + Cu, and CH4 + 2O2 → CO2 + 2H2O
[B]. Na2SO4 + BaCl2 → BaSO4 + 2NaCl
[C]. Pb + CuCl2 → PbCl2 + Cu, and Na2SO4 + BaCl2 → BaSO4 + 2NaCl
[D]. C + O2 → CO2, and CH4 + 2O2 → CO2 + 2H2O
Q17

It is advised that before burning in air, the magnesium ribbon is cleaned by rubbing with sandpaper. Why?

[A]. So that, it may readily combine with the oxygen of air.
[B]. So that, it may looks very shining.
[C]. So that, it can easily see by naked eyes at the time of burning.
[D]. None of the above.
Q18

A dilute ferrous sulphate solution was gradually added to the beaker containing acidified permanganate solution. The light purple colour of the solution fades and finally disappears. Which of the following is the correct explanation for the observation?

[A]. KMnO4 is an oxidising agent, it oxidises FeSO4.
[B]. FeSO4 acts as an oxidizing agent and oxidizes KMnO4.
[C]. The color disappears due to dilution; no reaction is involved.
[D]. KMnO4 is an unstable compound and decomposes in presence of FeSO4 to a colorless compound.
Q19

Which of the following statement is or are incorrect?

[A]. The burning of magnesium in air to form magnesium oxide.
[B]. The properties of the product magnesium oxide are entirely different from the reactants.
[C]. The chemical reaction between sodium carbonate and dilute hydrochloric acid is characterized by the evolution of carbon dioxide gas.
[D]. None of the above
Q20

Three beakers labelled as A, B and C each containing 25 mL of water were taken. A small amount of Na0H, anhydrous CuSO2 and NaCl were added to the beakers A, B and C respectively. It was observed that there was an increase in the temperature of the solutions contained in beakers A and B, whereas in case of beaker C, the temperature of the solution falls. Which one of the following statement (s) is (are) correct?

[A]. In beakers A and B, exothermic process has occurred.
[B]. In breakers A and B, endothermic process has occurred.
[C]. In beakers A and B, exothermic process has occurred, and In beaker C, endothermic process has occurred.
[D]. In breakers A and B, endothermic process has occurred, and In breaker C, exothermic process has occurred.
Q21

Which of the following are exothermic processes?

[A]. Reaction of water with quick time, Dilution of an acid
[B]. Dilution of an acid, Evaporation of water
[C]. Reaction of water with quick time, Sublimation of camphor (crystals)
[D]. Evaporation of water, Sublimation of camphor (crystals)
Q22

Boojho appeared in class test where he wrote some statements but he confused to know the incorrect statement. Would you help him to know that?

[A]. The substance which take part in a chemical reaction are called reactants.
[B]. The new substances produced as a result of chemical reaction are called products.
[C]. During a chemical reaction, atoms of one element do not change into those of another element.
[D]. None of the above
Q23

Which of the following statements about the given reaction is correct? 3Fe(s) + 4H2O(g) → Fe3O4(s) + 4H2(g)

[A]. Iron metal is getting oxidized, Water is getting reduced, Water is acting as reducing agent.
[B]. Water is acting as reducing agent, Water is acting as oxidising agent.
[C]. Iron metal is getting oxidized, Water is getting reduced, Water is acting as oxidising agent.
[D]. Water is getting reduced, Water is acting as oxidising agent.
Q24

The following reaction is an example of a: 4NH3 (g) +5O2 (g) → 4NO (g) +6H2O (g)

[A]. Displacement reaction, neutralisation reaction
[B]. Combination reaction, redox reaction
[C]. Displacement reaction, redox reaction
[D]. Redox reaction, neutralisation reaction
Q25

Which of the following is not a physical change?

[A]. Boiling of water to give water vapour.
[B]. Melting of ice to give water.
[C]. Dissolution of salt in water.
[D]. Combustion of Liquefied Petroleum Gas (LPG).

Prepare Class 10 Science Chapter 1 Chemical Reactions and Equations from NCERT Textbook and then practice the questions given in the end of the chapter. At this stage MCQs are important for the revision of concepts and missing terms related to the chapters. If you read 5 times the same chapter from NCERT, every time you will get something new again. It means we have to revise the chapter again and again.

Is Class 10 Science Chapter 1 Chemical Reactions and Equations important for MCQ?

There are so many questions in chapter 1 of class 10 science, which may be asked in CBSE Board exams as MCQs.

Should I prepare Activities also, given in Chapter 1 of class 10 Science, for MCQ?

Activities are important not only for MCQ, but the theoretical questions also. In CBSE 2020 exams, there were three questions based on activities.

Are MCQ asked from back exercises of Class 10 Science chapter 1?

MCQs can be asked from entire book, whether it is intext questions or end exercises questions.

How do I prepare for MCQs of 10th Science Chapter 1?

Prepare the chapter 1 NCERT Textbook of class 10 science and read each important reaction carefully. MCQs are generally asked from with in the chapter text.

Last Edited: January 27, 2022