Question

I actually wanted a perfect definition for the three types of combustion!

Answer 1

Types of combustion:
The type of combustion differs depending on the type of fuel. Based on nature and intensity combustions are classified into three types. They are:
1.Rapid combustion
2.Spontaneous combustion
3.Explosion

Rapid combustion:
The combustion in which large amount heat produced within a very short time is called rapid combustion.
Example: Liquefied Petroleum Gas (LPG) burns very quickly producing a lot of heat.

Spontaneous combustion:
The combustion which produced without application external source of heat is called spontaneous combustion.
Example:
When white phosphorous is left out in the open at room temperature for some time, it burns all by itself. Forest fires and fires in coal mines are because of spontaneous combustion.

Explosion:
The combustion which is accompanied by the release of heat, light, sound and large amount of heat is called explosion.
Example:
The burning of crackers produces a large amount of heat, light and sound because of chemical reaction.