set 4 MCQ Questions & Answers Detailed Explanation

Question : 1

Chemical formula of baking soda is –

a) Na₂CO₃

b) NaHCO₃

c) MgSO₄

d) MgCO₃

Question : 2

Two elements gallium and oxygen combine to form a compound Ga₂O₃. Which among the following is the valency of gallium ?

a) 3

b) 1

c) 2

d) 4

Question : 3

Which of the following is not a hydrated salt?

a) Baking soda

b) Washing soda

c) Blue vitriol

d) Epsom salt

Question : 4

Acid contained in the sting of an ant is ___________ .

a) formic acid

b) lactic acid

c) acetic acid

d) ascorbic acid

Question : 5

Consider the following statements.

1. Anhydrous Sodium bicarbonate is commonly known as baking sodium (baking soda).
2. Baking soda is used as a fire extinguisher.
3. Bleaching powders are produced in Hasnclaver plant.

a) 2 and 3

b) Only 3

c) 1, 2 and 3

d) 1 and 2

Question : 6

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