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Assertion:- During adiabatic expansion o...

Assertion:- During adiabatic expansion of an ideal gas, temperature falls but entropy remains constant.
Reason:- During adiabatic expansion, work is done by the gas using a part of internal energy and no heat exchange teakes place the system and the surrounding.

A

If both Assertion `&` Reason are True `&` the Reason is a correct explanation of the Assertion.

B

If both Assertion `&` Reason are True but Reason is not a correct explanation of the Assertion.

C

If Assertion is True but the Reason is False.

D

If both Assertion `&` Reason are False.

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The correct Answer is:
A
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