In an isothermal process, the internal energy  (a) increases  (b) decreases  (c) remains constant  (d) first increases and then decreases  (e) first decreases and then increases.

In an isothermal process, the internal energy  (a) increases  (b) decreases  (c) remains constant  (d) first increases and then decreases  (e) first decreases and then increases.
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Answer : c
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