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Chemistry Question 54 – JEE-MAIN 2025

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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) ΔVmix=0 Choose the correct answer from the options given below :

Solutions can exhibit positive deviation, negative deviation, or behave ideally.

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Ninja Strategy•Identify Key Examples

Recognizing that benzene-toluene is an ideal solution (C)-(IV) and acetic acid dimerizes in benzene (D)-(II) quickly narrows down the options to the correct answer.

Step 1: Analyze each mixture in List-I✦ Active

Let's analyze the behavior of each solution based on intermolecular forces and deviations from Raoult's law:

(A) Solution of chloroform and acetone: Chloroform (CHCl3) and acetone (CH3COCH3) form hydrogen bonds between them. This leads to stronger intermolecular forces than in pure components, resulting in negative deviation from Raoult's law.

(B) Solution of ethanol and water: Ethanol (C2H5OH) and water (H2O) both have strong hydrogen bonding. When mixed, the new interactions are weaker than the strong H-bonding in pure ethanol or pure water. This leads to positive deviation from Raoult's law.

(C) Solution of benzene and toluene: Benzene (C6H6) and toluene (C6H5CH3) are structurally similar non-polar molecules. They form an ideal solution, meaning there is no change in volume or enthalpy on mixing.

(D) Solution of acetic acid in benzene: Acetic acid (CH3COOH) undergoes dimerization in non-polar solvents like benzene due to hydrogen bonding.

Step 2: Match properties from List-II to List-I○ Expand

Now, let's match these behaviors to the properties in List-II:

(A) Negative deviation from Raoult's law leads to a maximum boiling azeotrope. So, (A) matches (III).

(B) Positive deviation from Raoult's law leads to a minimum boiling azeotrope. So, (B) matches (I).

(C) For ideal solutions, the change in volume on mixing is zero, i.e., ΔVmix=0. So, (C) matches (IV).

(D) Acetic acid dimerizes in benzene. So, (D) matches (II).

💡 Teacher's Secret Hint

Remember the relationship between deviation from Raoult's law and azeotrope formation.

Step 3: Form the correct matching pairs and select the option○ Expand

The correct matches are: (A)-(III), (B)-(I), (C)-(IV), (D)-(II).

Comparing this with the given options, option 3 is the correct choice.

💡 Teacher's Secret Hint

Carefully cross-check your derived matches with each provided option.

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