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11. The P-V diagram of a system undergoing thermodynamic transformation is shown in figure. The work done on the system in going from A → B → C is 50 J and 20 cal heat is given to the system. The change in internal energy between A and C is

(a)      34 J

(b)  70 J

(c)   84 J

(d)  134 J

Answer-d

(202)

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