Question

Which of the following does not result in an increase in entropy?

• A. Rusting of iron
• B. Conversion of ice to water
• C. Crystallisation of sucrose from solution
• D. Sublimation of camphor

Answer 1

Answer: (C)

Crystallisation of sucrose from solution

Entropy will go up when a solid becomes aqueous or when liquids mix. This is because there is an increased number of microstates that are indistinguishable from each other when a solid is dissolved or when liquids mix.

In crystallisation of sucrose from solution, the liquid is converted into solid. So this will lead to a decrease in entropy. Hence, crystallisation of sucrose from solution does not result in an increase in entropy.

Therefore, option C is correct.