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Combustion And Flame

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Science

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Science

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12

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 ___________ .


water


Fuel must be heated to its __________ before it starts burning.


ignition temperature


Burning of wood and coal causes __________ of air.


pollution


A liquid fuel, used in homes is __________


kerosene


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.