Question

rapid combustion and explosion

Answer 1

Rapid Combustion- When a fuel catches fire rapidly to form heat and light is known as Rapid Combustion. Comparatively less amount of heat is released at a time. Such as- Burning of petrol, kerosene, LPG, etc.

Explosive Combustion- When a fuel explodes when it catches fire to form heat and light is known as Explosive Combustion. A large amount of heat is released at a time. Such as- Crackers, Nuclear bombs, Hydrogen gas, etc.

Answer 2

Answer:

Combution in which a substance catches fire rapidly on ignition is called as "RAPID COMBUSTION".

Compaction in which substance burns suddenly producing sound along with heat and light is called as "EXPLOSION".

Explanation:

Paper ,LPG, candle, petrol and kerosene all a rapid combustion because they burnt rapidly on ignition.

Combustion of hydrogen burning of firecracker these are are explosion because they burn suddenly with sound and light when we ignit it .