Question

14.
Vacuum distillation is used to purify liquids
which
(A) are highly volatile.
(B) are explosive in nature.
(C) decompose below their boiling points.
(D) have high boiling point.​

Answer 1

Answer:

The answered is a are highly volatile

Answer 2

Answer:

Vacuum distillation is used to purify liquids which (D) have high boiling point.​

Explanation:

What is distillation:

• Distillation is the separation of distinct components of a mixture based on their different boiling points.
• Distillation is used to purify alcohol, refine crude oil, and desalinate water, among other things.

What is vacuum distillation:

• Some components have a very high boiling point, thus it is far better to reduce the pressure at which they are boiled rather than increase the temperature.
• The boiling and distillation processes are completed after the pressure is reduced. Vacuum distillation is the name for this method.
• It is a procedure that separates compounds based on differences in their boiling points and is carried out under reduced pressure. The pressure is decreased here because it aids in lowering the compound's boiling point.
• Vacuum distillation is also used to separate chemicals that boil above their decomposition temperature at atmospheric pressure and can be easily distilled at air pressure without being decomposed.
• In a nutshell, vacuum distillation is used when a compound's boiling point is too high (T > 150°C) or when a compound decomposes at a temperature below its boiling point and we need to distil it without it decomposing.