Pick out the wrong statement.

A. Surface tension of a substance vanishes at critical point, as there is no distinction between liquid and vapour phases at its critical point

B. Entropy of a system decreases with the evolution of heat

C. Change of internal energy is negative for exothermic reactions

D. The accentric factor for all materials is always more than one

Answer: Option D

Solution(By Examveda Team)

The acentric factor can’t always be greater than 1. For many monoatomic fluids the acentric factor is close to zero.