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A liquid fuel, used in homes is __________


kerosene

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


ignition temperature

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Burning of wood and coal causes __________ of air.


pollution

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Fire produced by oil cannot be controlled by ___________ .


water

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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.

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