Assertion :The velocity of sound in air increases due to the presence of moisture in it. Reason: The presence of moisture in air lowers the density of air.
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
Assertion is incorrect but Reason is correct
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Solution
The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
v=√Elasticitycoefficientdensity
Velocity of sound decreases with increase in density.
As moisture increases, the density of air increases and thus speed of sound will decrease.