1.

In thermodynamics, a process is called reversible when [AIIMS 2001]

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
Answer» D.                 The system changes into the surroundings spontaneously


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