NEETPhysicsThermodynamics
An ideal gas undergoes a cyclic process A B C D A, which forms a rectangle on a Pressure (P) versus Volume (V) diagram. The sides AB and CD are parallel to the volume axis, while BC and DA are parallel to the pressure axis. The volume of the gas increases during the process A B. Match List-I with List-II. List-I List-II (A) Process A B (I) Positive work (B) Process B C (II) Negative work (C) Process C D (III) Zero wo
Options
- A(A)-(I), (B)-(III), (C)-(II), (D)-(I)
- B(A)-(II), (B)-(III), (C)-(I), (D)-(II)
- C(A)-(III), (B)-(I), (C)-(III), (D)-(II)
- D(A)-(I), (B)-(II), (C)-(III), (D)-(III)
Correct answer
A. (A)-(I), (B)-(III), (C)-(II), (D)-(I)
Step-by-step solution
In a P-V diagram, the work done by a gas is the area under the process curve on the volume axis. For the process A B, the line is parallel to the volume axis (isobaric) and the volume increases. Since it is an expansion, the work done is positive. For the process B C, the line is parallel to the pressure axis (isochoric). The volume is constant ( V = 0 ), so the work done is zero. For the process C D, the process is isobaric and the volume decreases to return to the initial volume coordinate. Since it is a compress