[MP PMT 1990]
1 J
B) $ -1\ J $
2 J
D) ? 2 J
Correct Answer: D
$ dQ=0=-2+dW\Rightarrow dW=2\ \text{J} $
$ \Rightarrow $ Work done by the gas $ =2\ J $
$ \Rightarrow $ Work done on the gas $ =-2\ J $
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