1.
500kJ/kg
2.
The heat of fire decomposes baking soda ( sodium hydrogen carbonate) to produce carbon dioxide gas which cuts off supply of fresh air to the burning substance.
3.
combustible
4.
Option A
5.
Fuel
6.
30000kJ
7.
By removing heat or by cutting off the air supply to the burning substances.
8.
Option A
9.
Option C
10.
black
11.
Option B
12.
fire extinguisher
13.
Option D
14.
Because the supply of air is cut off by blanket, due to which clothes stop burning and fire gets extinguished.
15.
Carbon dioxide, water vapour, heat and light
16.
Option B
17.
Option B
18.
lesser
19.
Option A
20.
Option C
