set 4 MCQ Questions & Answers Detailed Explanation

Question : 1

Which of the following is not a hydrated salt?

a) Baking soda

b) Washing soda

c) Blue vitriol

d) Epsom salt

Question : 2

Which one among the following is not a property of salt?

a) Salts are brittle

b) Salts have ordered packing arrangements called lattices

c) Salts have low melting points but high boiling points

d) Salts conduct electricity when dissolved in water or even in the molten state

Question : 3

Bleaching powder gives smell of chlorine because it –

a) gives chlorine on exposure to atmosphere

b) is a mixture of chlorine and slaked lime

c) is unstable

d) contains excess of chlorine

Question : 4

Chemical formula of baking soda is –

a) Na₂CO₃

b) NaHCO₃

c) MgSO₄

d) MgCO₃

Question : 5

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 : 6

Acid contained in the sting of an ant is ___________ .

a) formic acid

b) lactic acid

c) acetic acid

d) ascorbic acid