Question

Assertion: In free expansion of a gas inside an aidabatic chamber Q, W and `DeltaU` all are zero.
Reason: In such an expansion `pprop1/V`.
A. (a) If both Assertion and Reason are true and the Reason is correct explanation of the Assertion.
B. (b) If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C. (c) If Assertion is true, but the Reason is false.
D. (d) If Assertion is false but the Reason is true.

Answer 1

Correct Answer - B
`Q=0` as chamber is adaibatic
`W=0` as expansion is taking place is vacuum.
`:.` `DeltaU=Q-W=0`
`:.` U or T constant
or `pV=constant
`:.p prop 1/V`