Question

Assertion Sound would travel faster on a hot summer day than on cold winter day.
Reason Velocity of sound is directly proportional to the square of its absolute temperature.

• A. If both the assertion and reason are true and reason explains the assertion.
• B. If both the assertion and reason are true but reason does not explain the assertion.
• C. If assertion is true but reason is false.
• D. If assertion is false but reason is true.

Answer 1

Answer: (A)

The velocity of sound in a gas is directly proportional to the square root of its absolute temperature (as $v=\sqrt{\frac{\rho R T}{M}}$ ). Since, temperature of a hot day is more than cold winter day, therefore saved would travel faster on hot summer day than on a cold winter day.