2019 SolutionsNon-ideal Solutions – Azeotropes Medium Question 24 of 62 in Solutions

The mixture that forms maximum boiling azeotrope is:

A Water + Nitric acid
B Ethanol + Water
C Acetone + Carbon disulphide
D Heptane + Octane

The answer is A.

Solution

Solutions showing negative deviation from Raoult's law form maximum boiling azeotropes. Water and nitric acid show negative deviation, so they form a maximum boiling azeotrope. (Ethanol + water and acetone + carbon disulphide show positive deviation; heptane + octane is nearly ideal.)

Concept maximum boiling azeotrope

Solutions in past papers

62 questions from this chapter have appeared across 25 exam years.