Foundation
Chemistry Foundation
Exothermic and Endothermic Reactions
Question

Fire may be extinguished -

All of the above.

by cutting off the supply of air. 

by removing all the combustible substance. 

by cooling the burning substance below their ignition temperature. 

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Solution

For production of fire three conditions are required. 
(i) presence of combustible substance.
(ii) presence of a supporter of a combustion.