Question

A mixture of two or more miscible liquids, for which the difference in the boiling points is less than 25 K can be separated by the process called:

• A. fractional distillation
• B. sedimentation
• C. decantation
• D. filtration

Answer 1

Answer: (A)

fractional distillation

Separation of a liquid mixture into fractions differing in boiling point (and hence chemical composition) by means of distillation, typically using a fractionating column is called fractional distillation. In other words, separation process in which the volatile components (having different boiling points) and the difference is less than 25 K of a mixture (such as crude oil) are split from one another by heating the mixture in a column and collecting and condensing the vapours drawn from different levels of the column.