Question

. Assertion: The velocity of sound increases with increases in humidity.
Reason: Velocity of sound does not depend upon the medium.
A. if both the assertion and reason are true and reson is a true explanation of the assertion.
B. if both the assertion and reason are true but the reason is not the correct explanation of assertion.
C. If the assertion is true but reason is false.
D. If both the assertion and reason are false.

Answer 1

Correct Answer - C
Velocity of sound in gas medium is `v=sqrt((K)/(rho))=sqrt((gammap)/(rho))`
`gamma` is ratio of its principal heat capacities `((C_p)/(C_v))`. For moist air `rho` is less than that for dry air and `gamma` is slightly greater
Velocity of sound increases with increase in humidity.