set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

Common salt besides being used in the kitchen can also be used as the raw material for making

1. Washing soda
2. Bleaching powder
3. Baking soda
4. Slaked lime

a) (i), (ii) and (iv)

b) (i) and (iii)

c) (i) and (ii)

d) (i), (iii) and (iv)

Question : 2

An unknown gas quickly dissolves in water. This gaseous aqueous solution turns red litmus into the blue. This gas produces hydrogen chloride with a white flame. This unknown gas is

a) Nitric hydroxide

b) Ammonia

c) Sulphur dioxide

d) Carbon monoxide

Question : 3

When vinegar reacts with baking soda the gas evolved is

a) oxygen

b) carbon dioxide

c) hydrogen

d) nitrogen dioxide

Question : 4

Baking soda is

a) Sodium Dihydrogen Carbonate

b) Disodium Hydrogen Carbonate

c) Sodium Hydrogen Carbonate

d) Sodium Carbonate

Question : 5

Which of the following is ‘quicklime’ –

a) Ca(OH)₂

b) CaCO₃

c) CaO

d) CaCl₂ .6H₂O

Question : 6

Acid rain is caused due to _____________ .

a) CO₂ , NO₂ , H₂

b) SO₂ N₂ , O₂

c) CO₂ , O₂ , SO₂

d) CO₂ , SO₂ , NO₂