What what types of combustions are …

There are three main types of combustion - rapid combustion, spontaneous combustion and explosive combustion.

1. Rapid combustion: The combustion reaction in which a large amount of heat and light are produced in a short time is called rapid combustion. The immediate burning of cooking gas (LPG) in a gas stove to give heat and light is an example of rapid combustion.
2. Spontaneous combustion: The type of combustion in which a material suddenly bursts into flames, without the application of any apparent cause is called spontaneous combustion. The spontaneous combustion reactions which take place in nature are very dangerous. Forest fires can be started by spontaneous combustion reaction.
3. Explosive combustion: A very fast combustion reaction in which a large amount of heat, light and sound are produced, is called explosive combustion or explosion. The fireworks (crackers, etc.) which we explode during festivals work on the explosive combustion of substances.