EASY
10th CBSE
IMPORTANT
Earn 100

Which of the following are endothermic reactions and which are exothermic reactions?
(i) Burning of natural gas
(ii) Photosynthesis
(iii) Electrolysis of water
(iv) Respiration
(v) Decomposition of calcium carbonate

Important Questions on Chemical Reactions and Equations

EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 2 Chemistry>Chapter 1 - Chemical Reactions and Equations>Multiple Choice Questions (MCQs)>Q 36
One of the following does not happen during a chemical reaction. This is:
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 2 Chemistry>Chapter 1 - Chemical Reactions and Equations>Multiple Choice Questions (MCQs)>Q 37
Which of the following does not involve a chemical reaction?
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 2 Chemistry>Chapter 1 - Chemical Reactions and Equations>Multiple Choice Questions (MCQs)>Q 38
You are given the solution of lead nitrate. In order to obtain a yellow precipitate, you should mix it with a solution of:
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 2 Chemistry>Chapter 1 - Chemical Reactions and Equations>Multiple Choice Questions (MCQs)>Q 39
An acid which can decolourise purple coloured potassium permanganate solution is:
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 2 Chemistry>Chapter 1 - Chemical Reactions and Equations>Multiple Choice Questions (MCQs)>Q 40
The chemical reaction between two substances is characterised by a change in colour from orange to green. These two substances are most likely to be:
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 2 Chemistry>Chapter 1 - Chemical Reactions and Equations>Multiple Choice Questions (MCQs)>Q 41
The chemical reaction between quicklime and water is characterised by:
MEDIUM
10th CBSE
IMPORTANT
Science for Tenth Class Part - 2 Chemistry>Chapter 1 - Chemical Reactions and Equations>Multiple Choice Questions (MCQs)>Q 42
One of the following is an endothermic reaction. This is:
MEDIUM
10th CBSE
IMPORTANT
Science for Tenth Class Part - 2 Chemistry>Chapter 1 - Chemical Reactions and Equations>Multiple Choice Questions (MCQs)>Q 43
Which of the following is not an endothermic reaction?