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Match List-I with List-II.
Column I
- A. $\text{CHCl}_3 + \text{C}_6\text{H}_5\text{NH}_2$
- B. Crude oil in petroleum industry
- C. Glycerol from spent-lye
- D. Aniline-water
Column II
- I. Distillation under reduced pressure
- II. Steam distillation
- III. Fractional distillation
- IV. Simple distillation
Correct answer: A → IV, B → III, C → I, D → II
Explanation
Chloroform + aniline: Simple distillation; Crude oil: Fractional distillation; Glycerol from spent-lye: Vacuum distillation; Aniline-water: Steam distillation.
Detailed Solution
Purification techniques: 1. $\text{CHCl}_3$ (b.p. $61^\circ\text{C}$) and aniline (b.p. $184^\circ\text{C}$) have a large difference in boiling points ($>50^\circ\text{C}$), separated by Simple distillation (IV). 2. Crude oil contains hydrocarbon fractions with close boiling points, separated by Fractional distillation (III). 3. Glycerol decomposes at its normal boiling point ($290^\circ\text{C}$), hence purified by Distillation under reduced pressure / vacuum distillation (I). 4. Aniline is steam volatile and immiscible with water, purified by Steam distillation (II). Hence, A-IV, B-III, C-I, D-II.