Home Chemistry Thermodynamics and Thermochemistry Basic concepts In thermodynamics, a process is called rever…
Chemistry Thermodynamics and Thermochemistry Basic concepts Single Correct MCQ
Published on: August 12, 2026

In thermodynamics, a process is called reversible when –

A
Surroundings and system change into each other
B
There is no boundary between system and surroundings
C
The surroundings are always in equilibrium with the system
D
The system changes into the surroundings spontaneously

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The correct answer is:
C

In a reversible process, the driving and the opposite forces are nearly equal, hence the system and the surroundings always remain in equilibrium with each other.

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