Gate ME-2007 Question Paper With Solutions

Q.39. Which combination of the following statements is correct?
P: A gas cools upon expansion only when its Joule-Thomson co-efficient is positive in the temperature range of expansion.

Q: For a system undergoing a process, its entropy remains constant only when the process is reversible.

R: The work done by a closed system in an adiabatic process is a point function.

S: A liquid expands upon freezing when the slope of its fusion curve on Pressure.
Temperature diagram is negative.

(A) R and S

(B) P and Q

(C) Q, R and S

(D) P,Q and R

Answer: (A)

Explanation:

Gate ME-2007 Question Paper With Solutions

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