EASY
10th CBSE
IMPORTANT
Earn 100

Which of the following is/are exothermic process(es)?
(i) evaporation of water
(ii) sublimation of ammonium chloride
(iii) quick lime is added to water
(iv) dilution of an acid

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Important Questions on Chemical Reactions and Equations

EASY
10th CBSE
IMPORTANT
ESSENTIALS OF CHEMISTRY X>Chapter 1 - Chemical Reactions and Equations>Value Based Questions>Q 35
Which of the following is/are endothermic reaction(s)?
(i) evaporation of water
(ii) sublimation of camphor
(iii) condensation of water vapour
(iv) dilution of an acid
EASY
10th CBSE
IMPORTANT
ESSENTIALS OF CHEMISTRY X>Chapter 1 - Chemical Reactions and Equations>Value Based Questions>Q 36
On electrolysis, water decomposes to hydrogen and oxygen. The mole ratio of hydrogen and oxygen is:
EASY
10th CBSE
IMPORTANT
ESSENTIALS OF CHEMISTRY X>Chapter 1 - Chemical Reactions and Equations>Value Based Questions>Q 37
A dilute ferrous sulphate solution is added to acidified permanganate solution. The light purple colour of the solution fades and finally disappears. It is due to:
EASY
10th CBSE
IMPORTANT
ESSENTIALS OF CHEMISTRY X>Chapter 1 - Chemical Reactions and Equations>Value Based Questions>Q 38
A small amount of CuSO4, NaOH and NaCl was added to water present in beakers A, B and C respectively. The temperature of beaker A and B increases, while that of beaker C decreases. The correct statement(s) is/are:
(i) in beakers A and B, endothermic process has occurred
(ii) in beakers A and B, exothermic process has occurred
(iii) in beaker C, exothermic process has occurred
(iv) in beaker C, endothermic process has occurred
EASY
10th CBSE
IMPORTANT
ESSENTIALS OF CHEMISTRY X>Chapter 1 - Chemical Reactions and Equations>Value Based Questions>Q 39
Silver Bromide on exposure to sunlight turns grey due to:
EASY
10th CBSE
IMPORTANT
ESSENTIALS OF CHEMISTRY X>Chapter 1 - Chemical Reactions and Equations>Value Based Questions>Q 40
The gases which can be used for storage of fresh sample of oil are:
EASY
10th CBSE
IMPORTANT
ESSENTIALS OF CHEMISTRY X>Chapter 1 - Chemical Reactions and Equations>Value Based Questions>Q 41
When a solution of barium chloride in water is added to an aqueous solution of sodium sulphate, the following happens:
EASY
10th CBSE
IMPORTANT
ESSENTIALS OF CHEMISTRY X>Chapter 1 - Chemical Reactions and Equations>Value Based Questions>Q 42
Rahul took some zinc granules in a test-tube and added dilute HCl to it. He observed that the colour of zinc granules changed to