MCQs on Distillation

MCQs on Distillation

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

(a) crystallisation

(b) chromatography

(c) sublimation

(d) steam distillation

Answer: (d)

2. The commonly used method to separate naphthalene from benzoic acid is

(a) sublimation

(b) crystallisation

(c) distillation

(d) chromatography

Answer: (a)

3. This is not separated by distillation

(a) chloroform and aniline

(b) milk and water

(c) impurities in seawater

(d) acetone and water

Answer: (b)

4. Porcelain chips are used in the distillation flask to prevent

(a) bumping

(b) overheating

(c) uniform boiling

(d) none of the above

Answer: (a)

5. 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

Answer: (b)

6. 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

Answer: (c)

7. Aniline is generally purified by

(a) fractional crystallization

(b) chromatography

(c) by adding oxalic acid

(d) steam distillation

Answer: (d)

8. A method to prepare absolute alcohol is

(a) vacuum distillation

(b) fractional distillation

(c) azeotropic distillation

(d) none of the above

Answer: (c)

9. 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

Answer: (c)

10. 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

Answer: (b)