Question: 72. Match the List-I with List-II.
| List-I (Mixture) | List-II(Method of Separation) |
|---|---|
| A. \mathrm{CHCl}_{3}+ \mathrm{C}_{6} \mathrm{H}_{5} \mathrm{NH}_{2} | 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-IV, B-III, C-I, D-II
(2) A-IV, B-III, C-II, D-I
(3) A-III, B-IV, C-I, D-II
(4) A-III, B-IV, C-II, D-I
Answer: Option (1)
Explanation:
\mathrm{CHCl}_{3} and aniline have sufficiently different boiling points and do not decompose on heating,
so they can be separated by simple distillation.
Hence, A is matched with IV.
Crude oil consists of a mixture of hydrocarbons with close boiling points.
Such mixtures are separated based on boiling ranges using fractional distillation in the petroleum industry. Hence, B is matched with III.
Glycerol has a very high boiling point and decomposes at atmospheric pressure.
Therefore, it is separated from spent-lye by distillation under reduced pressure.
Hence, C is matched with I.
Aniline and water are immiscible liquids where aniline is steam volatile.
Such mixtures are separated by steam distillation. Hence, D is matched with II.
Thus, the correct matching is A-IV, B-III, C-I, D-II,
corresponding to Option (1).