Consider the following statements:
Assertion (A) The velocity of sound in air increases due to the presence of moisture in it.
Reason (R ): The presence of moisture in air lowers the density of air.
Of these statements-

Options

A. If both the assertion and reason are true statement and reason is correct explanation of the assertion .
B. If both the assertion and reason are true statement but reason is not a correct explanation of the assertion .
C. If the assertion is true but the reason is a false statement.
D. If both assertion and reason are false statements.

Answer

A

Explanation

Velocity of sound in air is given by ` v=sqrt((gammaP)/(d))`
The density of water vapours is less that of dry air . Hence, the presence of moisture decreases density of air . This results in increase of velocity of sound .