Question

In a solution (A and B); The vapour pressure of A is 260 mmHg and B is 360 mmHg; Find the relative volatility?

(a) 0.72

(b) 1.38

(c) 2

(d) None of the mentioned

The question was posed to me during an interview.

I'm obligated to ask this question of Distillation-Vapour Liquid Equilibria topic in division Distillation of Mass Transfer

Answer 1

Correct choice is (a) 0.72

Explanation: Relative volatility= vapour pressure of A/ Vapour pressure of B

                                                     = 260/360

                                                    =0.72.