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

Question : 6 [CDS]

Which chemical was an important symbol in our freedom struggle ?

a) Medicine

b) Glucose

c) Fertilizer

d) Sodium chloride

Question : 7 [CDS]

Nail polish remover contains

a) formaldehyde

b) acetone

c) benzene

d) acetic acid

Question : 8

The chemical formula for 'laughing gas' is

a) N$O_2$ (Nitrogen dioxide)

b) $N_2$O(Nitrous oxide)

c) NO (Nitric oxide)

d) $N_2O_5$ (Nitrogen pentoxide)

Question : 9 [CDS]

What type of mixture is smoke?

a) Liquid mixed with a gas

b) Solid mixed with a gas

c) Gas mixed with a gas

d) Gas mixed with a liquid and a solid

Question : 10

Select the one that is not a chemical change ?

a) Dissolution of oxygen in water.

b) Dissolution of carbon dioxide in water.

c) Dissolution of ammonia in water.

d) None of these is a chemical change.