Air, combustion, rusting and fire fighting questions | form one Chemistry

Why hydrogen gas is ​ not​ a constituent of air?
A Because of being water soluble
B Because of being denser than air
C Because of being very light
D Because of being highly flammable.

Answer / Solution

UNSOLVED

Which gas is the least abundant gas in the air?

1. Nitrogen
2. Oxygen
3. Neon
4. Carbon dioxide

Answer / Solution

UNSOLVED

The process which produces energy in form of heat and light is called

1. decomposition
2. combustion
3. distillation
4. sublimation

Answer / Solution

UNSOLVED

The three components of fire triangle are heat, fuel and ______.

Answer / Solution

UNSOLVED

By using locally available materials in your school , state how the fire can be extinguished  in the following situations.

1. Kerosene spilled on the flow catches fire.
2. Friend`s clothes catch fire which gets out of her control.

Answer / Solution

UNSOLVED