Q.1 List conditions under which combustion can take place.

Conditions under which combustion can take place is:
(a) There must be a combustible substance that acts as a fuel for combustion.
(b) There must be air that provides oxygen which is a supporter of combustion.
(c) There must be heat that helps in the attainment of ignition temperature of the substance.

Combustion: It is a chemical process in which a substance reacts rapidly with oxygen and gives off heat. The original substance is called the fuel, and the source of oxygen is called the oxidizer.