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DeltaU=0 in a noncylic process of an ide...

`DeltaU=0` in a noncylic process of an ideal gas. The process

A

may be isothermal

B

must be isothermal

C

may be adiabatic

D

may be isobaric

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The correct Answer is:
A
Let A and B are two points on an isothermal curve. Join A and B by any curve C. Then on this curve C, `DeltaU=0` where c is not an isothermal curve.
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