Question

If a substance decomposes when heated below its boiling point, suitable method for extraction of such compounds is:

• A. Simple distillation
• B. Fractional distillation
• C. Vacuum distillation
• D. Crystallization

Answer 1

The correct option is C

Vacuum distillation

Vacuum distillation is a method of distillation whereby the pressure is reduced to less than its vapour pressure causing evaporation of most volatile liquids. Vacuum distillation is used when liquids to be distilled have high atmospheric boiling points or chemically change at the temperature near their atmospheric boiling points.