Name one pair of liquids which can be separated by using a separating funnel.

What difference in the property of two miscible liquids enables their separation by fractional distillation?

Name one pair of substances whose mixture can be separated by fractional distillation.

State whether the following statements are true or false:

(a) Alcohol can be separated from a mixture of alcohol and water by a separating funnel.

(b) Salt and water can be recovered from an aqueous salt solution by the process of evaporation.

Name the source from which nitrogen and oxygen are obtained on a large scale.