Chemistry - Liquid Solution Question with Solution | TestHub
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.NEET 2026 (Re-NEET)
Options:
Answer:
Solution:
Statement A is correct as an ideal solution is defined as one that obeys Raoult's law over the entire range of concentration.
Statement B is correct because in a mixture of chloroform and acetone, intermolecular hydrogen bonding occurs between the two different molecules. This makes the A-B interactions stronger than the A-A and B-B interactions in the pure liquids, resulting in a lower vapour pressure and a negative deviation from Raoult's law.
Statement C is incorrect because a mixture of aniline and phenol also exhibits strong intermolecular hydrogen bonding between the phenolic proton and the lone pair on the nitrogen atom of aniline. This leads to stronger A-B interactions compared to the pure liquids, resulting in a negative deviation from Raoult's law, not a positive deviation.
Therefore, only statements A and B are correct.
Answer: A and B only
