Question

Degree of freedom increases, as

(a) Reflux increases

(b) Purity decreases

(c) Purity increases

(d) Reflux decreases

This question was posed to me during an interview.

This is a very interesting question from Problems When Setting Simulation Input in portion Rigorous Distillation Calculations of Distillation Design

Answer 1

The correct answer is (c) Purity increases

The best explanation: Degree of freedom increases as Purity increases, as they are ditrectly proportional also this can be related using phase rule F =C –P+2.