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

50% studentsanswered this correctly

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 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

C u S O_{4}

,

N a O H

and

N a C l

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