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Questions  

An ideal gas is taken through the cycle ABCA, as shown.  If the net heat supplied to the gas in the cycle is 5J, the work done by the gas in the process  CA is 

a
-5 J
b
-10 J
c
-15 J
d
-20 J

detailed solution

Correct option is A

For cyclic process  ΔU=0 So, ΔQ=ΔW5=ΔWAB+ΔWBC+ΔWCA5=10+0+ΔWCAΔWCA=−5J

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