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JEE Main 2025 Apr 7 Shift 2, Chemistry Q13: Vapour Pressure Of A Solution

JEE Main2025Apr 7, Shift 2Chemistry
Q.

Match List-I with List-II

List-IList-II
(A) Solution of chloroform and acetone(I) Minimum boiling azeotrope
(B) Solution of ethanol and water(II) Dimerizes
(C) Solution of benzene and toluene(III) Maximum boiling azeotrope
(D) Solution of acetic acid in benzene(IV) = 0

Choose the correct answer from the options given below :

  1. A

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

  2. B

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

  3. C

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

  4. D

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

Solution

Chloroform and acetone show negative deviation from Raoult's law due to hydrogen bonding between the CHCl H and the acetone C=O oxygen; strong negative deviation produces a maximum boiling azeotrope, so (A) (III).

Ethanol and water show positive deviation, since mixing partially disrupts the extensive hydrogen bonding of the pure liquids; this produces a minimum boiling azeotrope, so (B) (I).

Benzene and toluene are structurally very similar with comparable intermolecular forces, forming a near-ideal solution with , so (C) (IV).

Acetic acid in a non-polar solvent like benzene associates through hydrogen bonding to form a cyclic dimer, so (D) (II).

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