33. In a thermodynamic process, pressure of a fixed mass of a gas is changed in such a manner that the gas molecules gives out 20 J of heat and 10 J of work is done on the gas. If the initial internal energy of the gas was 40 J, then the final internal energy will be
(a) 30 J (b) 20 J
(c) 60 J (d) 40 J
Ans. c
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a