Q118 / 200 · NEET 2012 (Screening) · Physics

One mole of an ideal gas goes from an initial state $A$ to final state $B$ via two processes. It first undergoes isothermal expansion from volume $V$ to $3 V$ and then its volume is reduced from $3 V$ to $V$ at constant pressure. The correct $p-V$ diagram representing the two processes is

  • A
    Figure
  • B
    Figure
  • C
    Figure
  • Correct answer
    D
    Figure

Solution

According to question first gas goes from volume $V$ to $3 V$ and after this volume is reduced from $3 V$ to $V$ at constant pressure. In isothermal expansion $p-V$ curve is rectangular hyperbola. Option (4) is correct

Hence, the correct answer is option: 'D'.

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