Question

C2. Fill in the blanks.
1. The solid fuel used for cooking in rural areas is
2. A liquid fuel used in homes for cooking is
3. Gaseous fuels are
fuels than the solid and liquid fuels.
4. Liquid hydrogen is used as fuel in
5. No combustion takes place in the
of a candle flame because of lack of oxygen.
6. Incomplete
of fuels produces many poisonous
7. Complete combustion of most of the fuels produces
which is responsible for global
warming
Column B
(i) Fire extinguisher
3. Match the two columns.
Column A
1. The amount of heat released when
a unit quantity of fuel is completely burnt
2. Spontaneous combustion
3. A device to extinguish fire
4. Supporter of combustion
5. Fuel for our body
6. Incomplete combustion of coal
(ii) Oxygen
(iii) Air pollution
(iv) Food
(v) Calorific value
(vi) White phosphorous​

Answer 1

1.wood

2.lpg

3.better

4.rockets

5.absence of oxygen

6.gases like carbon monoxide

7.carbon dioxide

Explanation:

match the following

1.calorific value

2.air pollution

3.fire extinguisher

4.oxygen

5.food

6.white Phosphorus