Which of the following example(s) represents rapid combustion?

Burning of matchstick.

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Burning of cooking gas.

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Phosphorus burns in air at room temperature.

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Ignition of a cracker.

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Solution

The correct options are
A Burning of matchstick.
B Burning of cooking gas.
The cooking gas burns rapidly and produces heat and light. Such combustion is called rapid combustion. The burning of matchsticks is also an example of rapid combustion. Ignition of cracker and burning of Phosphorous is an example of Explosion.
Option $A$ and $B$ are examples of combustion.

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^{0} C

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