Question

In vacuum distillation, substance boils at:

• A. its exact boiling point
• B. temperature slightly above its boiling point.
• C. a temperature below its boiling point
• D. under high pressures.

Answer 1

The correct option is C a temperature below its boiling point

Vacuum distillation is a method of distillation whereby the pressure above the liquid mixture to be distilled is reduced to less than its vapour pressure (usually less than atmospheric pressure) causing evaporation of the most volatile liquids and boiling of the components at a temperature below its boiling point.