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When an ideal gas undergoes unrestricted...

When an ideal gas undergoes unrestricted expansion

A

cooling occurs because the molecules lie above inversion temperature.

B

no cooling occurs as no attractive interactions exist among molecules.

C

cooling occurs as molecules collide with each other with loss of energy.

D

cooling does not occur as these do work equal to loss in kinetic energy.

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The correct Answer is:
B
Unrestricted expansion is possible only aginst zero pressure i.e., vacuum
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