Question

Which method is suitable to seperate different components in air?

• A. Distillation
• B. Fractional distillation
• C. Chromatography
• D. Evaporation

Answer 1

The correct option is B Fractional distillation

Fractional distillation is a separating technique used to separate the constituents of a liquid-liquid mixture having boiling point difference of less than 25${}^{\text{o}}$C by using a fractionating column.

Air is a homogeneous mixture of many different gases such as carbon dioxide, nitrogen, oxygen, argon, etc. Since these components have a difference in their boiling points less than 25${}^{\text{o}}$C, these are separated by the process of fractional distillation.