A) The internal energy changes in all processes
B) Internal energy and entropy are state functions
C) The change in entropy can never be zero
D) The work done in an adiabatic process is always zero
Correct Answer: B
Solution :
Internal energy does not change in isothermal process/The change in entropy AS can be zero for adiabatic process. Work done in adiabatic process may be non-zero. Here, we know that state functions are P, U, S, T, V (S-entropy) and path functions are O, W, so (b) is correct.
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