A) increased by 400 J
B) increased by 200 J
C) increased by 100 J
D) decreased by 200 J
Correct Answer: A
Solution :Work done \[=P\Delta V\,\therefore \,dW=50\times (4-10)\]\[=-300\,J\] Now, \[dQ=dU+dW\ \therefore \,dU=100+300=400\,J\] Hence, the correction option is [a].
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