JEE Main 2019 Chemistry question

Chemistry Thermodynamics JEE Main 2019

The process with negative entropy change is:

(A)Dissociation of CaSO(s) to CaO(s) and SO(g)
(B)Dissolution of iodine in water
(C)Synthesis of ammonia from N and HCorrect
(D)Sublimation of dry ice

Answer: (C)

Solution

4 mol of gas → 2 mol of gas.

Question ID VK-010609