The System that Forms Maximum Boiling Azeotrope is (A) Carbon Disulphide -Acetone (B) Benzene – Toluene (C) Acetone – Chloroform (D) N-Hexane – N-Heptane

Answer: (C) Acetone – Chloroform

Explanation: A mixture of chloroform and acetone produces a solution that deviates from Raoult’s law in a negative way. This is due to the fact that the chloroform molecule can create a hydrogen bond with the acetone molecule, as indicated.

This reduces the tendency of molecules to escape for each component, lowering the vapour pressure and causing a negative divergence from Raoult’s equation.

Maximum boiling azeotrope at a certain composition is formed by solutions with a substantial negative deviation from Raoult’s law.