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Q.

Which of the following is not an example of spontaneous combustion?

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a

Burning of phosphorous in air

b

Burning of sodium in air

c

Bursting of crackers

d

Forest fire

answer is B.

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Detailed Solution

The bursting of crackers is not an example of spontaneous combustion.

A type of combustion in which the substance suddenly catches fire without the supply of heat or friction externally is called spontaneous combustion. Crackers burst when external heat is supplied and produce a lot of heat, light, and sound. So bursting of crackers is an example of an explosion type of combustion.

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