Question

At Total reflux

(a) Residue is nil

(b) Distillate is nil

(c) Reflux is nil

(d) All of the mentioned

The question was posed to me during an interview.

My doubt is from Reflux Ratio Concept (Minimum, Maximun & Optimum) in chapter Distillation of Mass Transfer

Answer 1

Right choice is (b) Distillate is nil

For explanation I would say: Total reflux there condensed vapours are sent back to the column itself.