Give an example of a balanced chemical equation:
(a) Taking place in the presence of a catalyst.
(b) Taking place in the presence of heat.
(c) Taking place at a particular temperature.

Important Questions on Chemical Reactions and Equations

EASY

10th CBSE

IMPORTANT

Concise Chemistry Part 2>Chapter 1 - Chemical Reactions and Equations>MOCK TEST - 2>Q 18

Give any three examples of physical change.

EASY

10th CBSE

IMPORTANT

Concise Chemistry Part 2>Chapter 1 - Chemical Reactions and Equations>MOCK TEST - 2>Q 18

Give any three examples of chemical change.

HARD

10th CBSE

IMPORTANT

Concise Chemistry Part 2>Chapter 1 - Chemical Reactions and Equations>MOCK TEST - 2>Q 19

Give balanced equations for the following reactions:
(a) Combination reaction.
(b) Displacement reaction.
(c) Double displacement reaction

MEDIUM

10th CBSE

IMPORTANT

Concise Chemistry Part 2>Chapter 1 - Chemical Reactions and Equations>MOCK TEST - 2>Q 20

What happens when a zinc strip is dipped into a copper sulphate solution? Explain with a balanced equation.

MEDIUM

10th CBSE

IMPORTANT

Concise Chemistry Part 2>Chapter 1 - Chemical Reactions and Equations>MOCK TEST - 2>Q 21

(a) Write a balanced chemical equation for the reactions that take place during respiration.
(b) Identify the type of combination reaction that takes place during this process and justify the name.
(c) Give one example of this type of reaction.

MEDIUM

10th CBSE

IMPORTANT

Concise Chemistry Part 2>Chapter 1 - Chemical Reactions and Equations>MOCK TEST - 2>Q 22

(a) Name the salts that are used in black and white photography.
(b) Give reactions when they are exposed to light.
(c) Define the type of chemical reaction taking place.
(d) When is a chemical reaction considered double displacement reaction?

MEDIUM

10th CBSE

IMPORTANT

Concise Chemistry Part 2>Chapter 1 - Chemical Reactions and Equations>MOCK TEST - 2>Q 23

Describe an activity to show the decomposition reaction in which light is used to decompose a reactant. Write the chemical equation of the reaction and state one of its uses.

HARD

10th CBSE

IMPORTANT

Concise Chemistry Part 2>Chapter 1 - Chemical Reactions and Equations>MOCK TEST - 2>Q 24

(a) Account for the following:
(i) White silver chloride turns grey in sunlight.
(ii) Brown coloured copper powder on heating in the air turns into black coloured substance.