Question

Express the point A

(a) Vapour pressure of the high volatile component

(b) Vapour pressure of the low volatile component

(c) Pure component B

(d) None of the mentioned

The question was posed to me in an interview for job.

This interesting question is from Deviation from Idealities Concept topic in portion Distillation of Mass Transfer

Answer 1

The correct option is (b) Vapour pressure of the low volatile component

The best I can explain: Since there  is a low vapour pressure at the point A, it the representation of low volatile component.