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
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.