RE-NEET2026Chemistry-Thermodynamics
RE-NEET 2026 Chemistry Laws of Thermodynamics MCQ Question
Type: MCQ-conceptual-Hard-Class 11
Consider the reversible processes for 1.0 mol of an ideal gas as shown in the figure. w₁, w₂, w₃ and w₄ represent work done (in calories) in the processes 1, 2, 3 and 4, respectively; ΔU₂ and ΔU₄ are changes in the internal energy for the processes 2 and 4, respectively. [use R = 2 cal K⁻¹ mol⁻¹] The correct option is
A
w₂ + w₄ = ΔU₂ - ΔU₄
B
w₁ + w₂ = 2T₁ ln V₂/V₁
C
w₁ + w₂ + w₃ + w₄ = 0
D
w₁ + w₃ = -2T₁ ln V₂/V₁ - 2T₂ ln V₄/V₃
Correct Answer
Option 3
Detailed Explanation
For a cyclic process, the net work done is zero, hence w₁ + w₂ + w₃ + w₄ = 0.
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