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Assertion : For an isolated system, $q$ is zero.
Reason : In an isolated system, change in $U$ and $V$ is zero.
Options:
Reason : In an isolated system, change in $U$ and $V$ is zero.
Solution:
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Verified Answer
The correct answer is:
If both assertion and reason are true but reason is not the correct explanation of assertion.
For an isolated system,
$W=q=0$
$\Delta U=q+W$
Hence, $\Delta U=0$
$W=P \Delta V$
as $W=0 \mathrm{so}, \Delta V=0$
$W=q=0$
$\Delta U=q+W$
Hence, $\Delta U=0$
$W=P \Delta V$
as $W=0 \mathrm{so}, \Delta V=0$
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