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)
