Match List I with List II
List-I (Mixture) List-II (Method of separation)
A. CHCl3 + C6H5NH2 (I) Dis

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Question

Match List I with List II
List-I (Mixture) List-II (Method of separation)
A. CHCl3 + C6H5NH2 (I) Distillation under reduced pressure
B. Crude oil in petroleum industry (II) Steam distillation
C. Glycerol from spent-lye (III) Fractional distillation
D. Aniline - water (IV) Simple distillation
Choose the correct answer from the options given below:
(1) A-III, B-IV, C-II, D-I
(2) A-IV, B-III, C-I, D-II
(3) A-IV, B-III, C-II, D-I
(4) A-III, B-IV, C-I, D-II

Accepted Answer

Correct Answer: B — A-IV, B-III, C-I, D-IIStep-by-step Solution:A. CHCl₃ + C₆H₅NH₂ → Simple Distillation (IV): Both are miscible liquids with a large boiling point difference (CHCl₃ bp 61°C; aniline bp 184°C). Simple distillation is sufficient.B. Crude oil → Fractional Distillation (III): Crude oil is a mixture of many hydrocarbons with close boiling points, separated using a fractionating column.C. Glycerol from spent-lye → Distillation under reduced pressure (I): Glycerol (bp ~290°C) decomposes before boiling at atmospheric pressure. Reducing pressure lowers the boiling point, enabling safe distillation.D. Aniline–water → Steam Distillation (II): Aniline is immiscible with water and steam-volatile. It distils below 100°C with steam, well below its normal bp of 184°C.Key Concepts:Simple distillation: Used when boiling point difference > 25°C and liquids are miscible.Fractional distillation: Used when boiling point difference is small; uses a fractionating column.Vacuum distillation: For high-boiling or thermally unstable compounds. Boiling point decreases with reduced pressure.Steam distillation: For water-immiscible, steam-volatile substances. P(total) = P(water) + P(compound), so it distils below 100°C.

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