Q.

Water can be separated from alcohol water mixture by –

A. decantation
B. evaporation
C. distillation
D. sublimation
Answer» C. distillation
Explanation: Distillation is a method of separating mixtures based on differences in volatilities of components in a boiling liquid mixture. Distillation is a unit operation, or a physical separation process, and not a chemical reaction. Commercially, distillation has a number of applications. It is used to separate crude oil into more fractions for specific uses such as transport, power generation and heating. Water is distilled to remove impurities, such as salt from seawater. Air is distilled to separate its components— notably oxygen, nitrogen, and argon— for industrial use.
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