RE-NEET 2026 Chemistry Raoult’s Law MCQ Question with Solution

Consider the following statements about the solutions formed by mixing two liquids.

A. An ideal solution thus formed obeys Raoult’s law throughout the composition range.

B. Mixture of chloroform and acetone shows negative deviation from Raoult’s law.

C. Mixture of aniline and phenol shows positive deviation from Raoult’s law.

A

B and C only

B

A only

C

A and C only

D

A and B only

Option D

Topic: Solutions → Raoult’s Law Difficulty: 🟡 Medium

A. Correct ✅ An ideal solution obeys Raoult’s law throughout the entire composition range.

B. Correct ✅ Chloroform + acetone forms strong H-bonding between the two molecules:

\text{CHCl}_3\cdots O=C(CH_3)_2

So intermolecular attraction increases → molecules escape less easily → negative deviation.

C. Incorrect ❌ Aniline + phenol forms strong H-bonding, so it shows negative, not positive, deviation. (CloudFront)

\boxed{A+B\text{ only}\Rightarrow D}

Stronger A–B attraction → Negative deviation Weaker A–B attraction → Positive deviation

📌 NCERT: In negative deviation, intermolecular attractions between unlike molecules are stronger than those between like molecules.

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RE-NEET 2026 Chemistry Raoult’s Law MCQ Question