set 4 MCQ Questions & Answers Detailed Explanation

Question : 1

Acid contained in the sting of an ant is ___________ .

a) formic acid

b) lactic acid

c) acetic acid

d) ascorbic acid

Question : 2

Statement I :
Addition of water to an aqueous solution of HC1 decreases the pH.
Statement II :
Addition of water suppresses the ionisation of HC1.

a) Statement I is true, but Statement II is false

b) Both the statements are individually true and Statement II is the correct explanation of Statement I

c) Both the statements are individually true but Statement II is not the correct explanation of Statement I

d) Statement I is false, but Statement II is true

Question : 3

Chemical formula of baking soda is –

a) Na₂CO₃

b) NaHCO₃

c) MgSO₄

d) MgCO₃

Question : 4

Bleaching powder gives smell of chlorine because it –

a) is a mixture of chlorine and slaked lime

b) is unstable

c) gives chlorine on exposure to atmosphere

d) contains excess of chlorine

Question : 5

Table salt (NaCl) is a product of

a) Strong acid and strong base

b) Weak acid and strong base

c) Weak acid and weak base

d) Strong acid and weak basic