What are combustible and non-combustible substances ? Explain with examples.
The substances in which combustion takes place are called combustible substances. For example : wood, paper, coal.
The substances in which no combustion takes place are called non-combustible substances. For example : Glass, iron nail.
Fire produced by oil cannot be controlled by ___________ .
Fuel must be heated to its __________ before it starts burning.
Burning of wood and coal causes __________ of air.
A liquid fuel, used in homes is __________
List conditions under which combustion can take place.
Conditions necessary for combustion are :
(i) Presence of combustible substance.
(ii) Attainment of ignition temperature.
(iii) Proper supply of air to provide oxygen.