Match the thermodynamic processes on an ideal gas given in column-I with the corresponding change in internal energy (dU), heat transfer (dQ) and work done (dW) given in column-II.
Column-I Column II
a) Isothermal process p) Pressure = constant
b) Adiabatic process q) $d W = - d U$
c) Isochoric process r) $d U = 0$
d) Isobaric process s) $d Q = d U$

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$a - r; b - p; c - r; d - s$

$a - r; b - p; c - s; d - r$

$a - r; b - q; c - s; d - p$

$a - p; b - q; c - r; d - s$

answer is A.

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Detailed Solution

Isothermal process, T = constant $\Rightarrow d U = 0$

Adiabatic process, $d Q = 0 \Rightarrow d U + d W = 0$

Isochoric process, $d V = 0, d W = 0 \Rightarrow d Q = d U$

Isobaric process, P = constant

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