For adiabatic process, wrong statement is
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(d) For adiabatic process no heat is transferred hence $\mathrm{d} \mathrm{Q}=0$
$\mathrm{du}=-\mathrm{d} \mathrm{w}$
As $\quad \mathrm{dQ}=0$ means $\mathrm{Q}$ is constant
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