Verified Solution • 2025–26 Session moderate

QJEEM20Ph723e: JEE Main 2020 Physics - Class 11 JEEM20Ph723e Solution: Match the thermodynamic processes taking place in a system with …

Match the thermodynamic processes taking place in a system with the correct conditions. In the table : Δ\Delta Q is the heat supplied, Δ\Delta W is the work done and Δ\Delta U is change in internal energy of the system.

Process Condition
(I) Adiabatic (1) Δ\Delta W = 0
(II) Isothermal (2) Δ\Delta Q = 0
(III) Isochoric (3) Δ\Delta U ≠\ne 0, Δ\Delta W ≠\ne 0, Δ\Delta Q ≠\ne 0
(IV) Isobaric (4) Δ\Delta U = 0

Multiple Choice Options

  • A (I) - (1), (II) - (1), (III) - (2), (IV) - (3)
  • B (I) - (2), (II) - (4), (III) - (1), (IV) - (3)
  • C (I) - (1), (II) - (2), (III) - (4), (IV) - (4)
  • D (I) - (2), (II) - (1), (III) - (4), (IV) - (3)

Step-by-Step Verified Solution

(I) Adiabatic, Δ\Delta Q = 0

(II) Isothermal, Δ\Delta U = 0

(III) Isochoric, ∫pdV\int {pdV} = 0 ⇒\Rightarrow W = 0

(IV) Isobaric process ⇒\Rightarrow Pressure remains constant

W = P. Δ\Delta V ≠\ne 0

Δ\Delta U ≠\ne 0

Δ\Delta Q = nCp Δ\Delta T ≠\ne 0

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