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Question

Assertion :The change in air pressure affects the speed of sound. Reason: The speed of sound increases is proportional to the square of pressure.

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Both Assertion and Reason are incorrect
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Solution

The correct option is D Both Assertion and Reason are incorrect
Speed of sound in cases is independent of pressure because v=γPp
At constant temperature, if P changes then p also changes in such a way that the ratio Pp remains constant. Hence there is no effect of the pressure change on the speed of sound.

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