Question

The use of solvent for increasing the relative volatility is for

(a) Multi-component distillation

(b) Reactive distillation

(c) Azeotropic distillation

(d) Extractive distillation

This question was addressed to me during an interview.

I want to ask this question from Distillation Types topic in section Distillation of Mass Transfer

Answer 1

Correct answer is (d) Extractive distillation

To explain I would say: Generally, solvent is used for extraction. As it helps to alter the relative volatility it is used in extractive distillation.