Distillation MCQs

Distillation is a method used to remove non-volatile impurities from volatile liquids. It can also separate volatile liquids with significantly different boiling points. For liquids with close boiling points, fractional distillation is employed. Additionally, substances that decompose before reaching their boiling points are purified through distillation under reduced pressure, known as vacuum distillation.

Porcelain chips are used in the distillation flask to prevent

(a) bumping
(b) overheating
(c) uniform boiling
(d) none of the above

Aniline is generally purified by

(a) fractional crystallization
(b) chromatography
(c) by adding oxalic acid
(d) steam distillation

This is not separated by distillation

(a) chloroform and aniline
(b) milk and water
(c) impurities in seawater
(d) acetone and water

By using which of the following methods, can glycerine be purified?

(a) simple distillation
(b) steam distillation
(c) vacuum distillation
(d) none of the above

The commonly used method to separate naphthalene from benzoic acid is

(a) sublimation
(b) crystallisation
(c) distillation
(d) chromatography

A method to prepare absolute alcohol is

(a) vacuum distillation
(b) fractional distillation
(c) azeotropic distillation
(d) none of the above

A mixture of o-nitrophenol and p-nitrophenol can be separated by

(a) crystallisation
(b) chromatography
(c) sublimation
(d) steam distillation

Chloroform and aniline can be separated by distillation. The boiling points of chloroform and aniline are _ and ___ respectively.

(a) 457 K and 334 K
(b) 334 K and 457 K
(c) 350 K and 438 K
(d) 438 K and 350 K

The residue left in the round bottom flask in the process of distillation is

(a) volatile
(b) non-volatile
(c) both
(d) none of the above

Distillation is the best method to separate liquids having sufficient difference in their

(a) solubility
(b) melting point
(c) boiling point
(d) none of the above