Question

The fuel which we choose for our domestic or industrial use should have a high calorific value. Carbon dioxide and water vapour are the harmless products produced by the burning of fuels. Hut some fuels produce poisonous gases like carbon monoxide (CO) and sulphur dioxide (SO₂),etc., which pollute the air around us. The fuel should have a proper ignition temperature which should be well above the normal room temperature.

1. The calorific value of the fuel which we choose for our domestic or industrial use should be

a. High

b. Low

c. Moderate

d. Zero

2. The harmless product produced by the burning of fuels are 

a. Sulphur dioxide

b. Carbon dioxide

c. Carbon monoxide

d. None of these

3. ............ and ............. are the poisonous gases produced by burning of some fuels

a. Carbon monoxide and carbon dioxide

b. Carbon monoxide and Sulphur monoxide

c. Carbon monoxide and sulphur dioxide

d. None of these

4. The ignition temperature of fuel should be ............. the room temperature

a. Below

b. Above

c. Same

d. Can not be determined

5. Chemical formula of Carbon monoxide and Sulphur dioxide are :

a. (CO) and (SO) respectively

b. (CO₂) and (SO) respectively

c. (CO₂) and (SO₂) respectively

d. (CO) and (SO₂) respectively

Answer 1

1. a. High

2. b. Carbon dioxide

3. c. Carbon monoxide and sulphur dioxide

4. b. Above

5. d. (CO) and (SO₂) respectively