nature of matter and composition - Category wise Question and Answer Practice Test with Solutions

Question : 26

Non-reacting gases have a tendency to mix with each other. This phenomenon is known as

a) effusion

b) chemical reaction

c) diffusion

d) explosion

Question : 27 [CDS]

Which one among the following is a sin smelling agent added to LPG cylinder to help the detection of gas leakage?

a) Methane

b) Ethanol

c) Thioethanol

d) Chloroform

Question : 28

Match the following columns?

a) A - 4, B - 2, C - 3, D - 1

b) A - 2, B - 3, C - 1, D - 4

c) A - 1, B - 2, C - 4, D - 3

d) A - 1, B - 2, C - 3, D - 4

Question : 29

A mixture of ethanol and water can be separated by

a) fractional distillation

b) decantation

c) filtration

d) sublimation

Question : 30 [CDS]

Which of the following is a good lubricant ?

a) Molten carbon

b) Diamond powder

c) Graphite powder

d) Alloy of carbon and iron