Question

Acetone and methanol form a binary minimum-boiling azeotrope, of about?

(a) 75.8% acetone

(b) 80% acetone

(c) 70% acetone

(d) 50% acetone

I had been asked this question in unit test.

My question is taken from Extractive Distillation Terminology in division Azeotropic and Extractive Distillation of Distillation Design

Answer 1

Correct answer is (a) 75.8% acetone

Explanation: Acetone and methanol form a binary minimum-boiling azeotrope of about 78.5 mole % acetone, Water is miscible and zeotropic in the whole composition space.