Chemical Reactions and Equations MCQs | Class 10 Science Chapter 1 Quiz

Are you preparing for CBSE Class 10 Science Chapter 1 – Chemical Reactions and Equations? Test your knowledge with these MCQs based on the latest NCERT syllabus. This quiz will help you revise important concepts like types of chemical reactions, balancing equations, and oxidation-reduction reactions. Attempt the quiz now and check your score instantly!

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Class 10 Science Chapter 1 Chemical Reactions and Equations MCQs

Chapter 1: Chemical Reactions and Equations

1 / 15

Which of the following reaction(s) is an endothermic reaction?

2 / 15

Identify the endothermic reaction(s) among the following:

    1. 6CO2 + 12H2O → C6H12O6 + 6O2 + 6H2O

    1. Na2CO3 + 2HCl → 2NaCl + CO2 + H2O

    1. C6H12O6 + 6O2 → 6CO2 + 6H2O

    1. CaCO3 → CaO + CO2 

3 / 15

Assertion (A): While equalizing the number of atoms to balance a chemical equation, we alter the formula of the compounds or elements involved in the reaction.

Reason (R): A chemical equation is balanced by making the number of atoms of each element equal on both sides of the arrow.

4 / 15

Assertion (A): In the reaction: MnO2 + 4HCl → MnCl2 + 2H2O + Cl2

HCl is getting oxidized while MnO2 is getting reduced.

Reason (R): The process in which oxygen is added to a substance is called oxidation whereas the process in which oxygen is removed from a substance is called reduction.

6 / 15

Which of the following are exothermic processes?

  1. Reaction of water with quick lime
  2. Dilution of an acid
  3. Evaporation of water
  4. Sublimation of camphor (crystals)

7 / 15

Assertion (A): Following is a balanced chemical equation for the action of steam on iron:

3Fe  +  4H20 → Fe3O4  + 4H2

Reason (R): The law of conservation of mass holds good for a chemical equation.

8 / 15

You are given the solution of lead nitrate. In order to obtain a yellow precipitate you should mix with it a solution of ______.

9 / 15

The silver chloride is placed under the sunlight as shown in the figure. The color of silver chloride after some time is:

chemical reactions and equations questions and answer

10 / 15

Sunita takes about 2 g ferrous sulphate crystals in a dry boiling tube and heats the boiling tube over the flame of a burner or spirit lamp as shown in the figure.

chemical reactions and equations questions and answers

The color of crystals after heating is:

11 / 15

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

    1. It is an endothermic reaction.

    1. It is an exothermic reaction.

    1. The pH of the resulting solution will be more than seven.

    1. The pH of the resulting solution will be less than seven.

12 / 15

13 / 15

Which of the following statements about the given reaction are correct?

3Fe + 4H2O → Fe3O4 + 4H2

    1. Iron metal is getting oxidized.

    1. Water is getting reduced.

    1. Water is acting as a reducing agent.

    1. Water is acting as an oxidizing agent.

14 / 15

Electrolysis of water is a decomposition reaction. The mole ratio of hydrogen and oxygen gases liberated during the electrolysis of water is

15 / 15

Identify the product which represents the solid state in the above reaction.

chemical reactions and equations questions

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