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JEE Main 2025 Apr 2 Shift 2, Chemistry Q11: Purification Methods

JEE Main2025Apr 2, Shift 2Chemistry
Q.

Match List-I with List-II

List-I (Purification technique)List-II (Mixture of organic compounds)
(A)Distillation (simple)(I)Diesel + Petrol
(B)Fractional distillation(II)Aniline + Water
(C)Distillation under reduced pressure(III)Chloroform + Aniline
(D)Steam distillation(IV)Glycerol + Spent-lye

Choose the correct answer from the options given below :

  1. A

    (A)-(II), (B)-(III), (C)-(IV), (D)-(I)

  2. B

    (A)-(II), (B)-(IV), (C)-(I), (D)-(III)

  3. C

    (A)-(III), (B)-(IV), (C)-(II), (D)-(I)

  4. D

    (A)-(III), (B)-(I), (C)-(IV), (D)-(II)

Solution

Choosing the technique by the property of the mixture:

Simple distillation works when boiling points differ by a wide margin: chloroform (61 C) and aniline (184 C) qualify A-(III).

Fractional distillation is needed for mixtures with close boiling points such as diesel and petrol B-(I).

Glycerol decomposes at its normal boiling point, so it is separated from spent-lye by distillation under reduced pressure C-(IV).

Aniline is steam-volatile and immiscible with water, ideal for steam distillation D-(II).

A-III, B-I, C-IV, D-II.

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