set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

Select the one that is a chemical change.

a) Cooking of food

b) Freezing of water

c) Melting of wax

d) None of these

Question : 2

The oxide of which of the following elements is used as a coolant?

a) Carbon

b) Silicon

c) Nitrogen

d) Phosphorus

Question : 3

Which one among the following is not a mixture?

a) Brass

b) Graphite

c) Glass

d) Steel

Question : 4

Camphor can be purified by

a) sedimentation

b) filtration

c) distillation

d) sublimation

Question : 5

What is the term used to denote the critical temperature at which the air becomes saturated with vapour and below which the condensation is likely to begin ?

a) Dew point

b) Condensation point

c) Evaporation point

d) Point of critical temperature

Question : 6

Amalgam is a solution of

a) liquid in solid

b) solid in solid

c) solid in liquid

d) liquid in liquid