Cracker on ignition produces
Question:

Cracker on ignition produces sound. Why?

Solution:

When a cracker is ignited, a sudden reaction (very rapid) takes place with the evolution of heat, light and sound and a large amount of gas is

liberated. Such a reaction is called explosion. The gases produced are heated by the heat evolved in the reaction.

The hot gases expand rapidly and cause an explosion (producing a loud sound).

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