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प्रश्न
Cracker on ignition produces sound. Why?
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उत्तर
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 an 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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