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Q.

The example of spontaneous combustion is/are


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a

All of the above 

b

Burning of a matchstick

c

Burning of phosphorus

d

Burning of fireworks

answer is B.

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Detailed Solution

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Burning of phosphorus is an illustration of spontaneous combustion.
Combustion is a type of a chemical reaction which occurs between two or more substances, occurring in the presence of oxygen and produces heat and light in the form of a flame. Spontaneous combustion is one of the types of combustion. In this type, a substance suddenly bursts into flames with heat and light without the application of any external cause. The burning of phosphorus is one such example. It burns automatically when it is exposed into the air.
 
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