set 3 MCQ Questions & Answers Detailed Explanation

Question : 1

Why bases are kept in glass bottles?

a) Bases are corrosive in nature

b) Bases produce OH– ions in aqueous solutions

c) Basic solutions are conducting in nature

d) Bases have soapy texture

Question : 2

The hypo solution used in photography is an aqueous solution of

a) Sodium tetrathionate

b) Sodium sulphate

c) Sodium thiosulphate

d) Ammonium per sulphate

Question : 3

When the stopper of a bottle containing colourless liquid was removed, the bottle gave smell like that of vinegar. The liquid in the bottle could be

a) sodium hydroxide solution

b) acetic acid solution

c) hydrochloric acid

d) saturated sodium hydrogen carbonate solution

Question : 4

Acids and bases are important because of

a) their effects on human health

b) their effect on farmer’s crop

c) their use in industry

d) all the above are correct.

Question : 5

Aluminium is used in thermite welding because –

a) aluminium is a strong oxidising agent

b) aluminium is a light metal

c) aluminium has more affinity for oxygen

d) aluminium is a reactive metal

Question : 6

The presence of which of the following acid causes indigestion:

a) Oxalic acid

b) Acetic acid

c) Citric acid

d) Hydrochloric acid