Answer:
Option A,B
Explanation:
When the intermolecular attraction between two components A and B in the mixture is same as between A and A or B and B, hence it is a case of ideal solution. When intermolecular attraction between A and B in a mixture is smaller than the between A and A or B and B, then mixture is more vaporised, bp is lowered. It is a case of positive deviation from Raoult's law. When intermolecular attraction between A and B is higher than that between A and A or B and B, then mixture is less vaporised bp is increased. It is a case of negative deviation.
(a) Methanol molecules ( $CH_{3}OH_{}$) are hydrogen-bonded. In a mixture of CCl4 and $CH_{3}OH_{}$, extent of H-bonding is decreased. Mixture is more vaporised thus, positive deviation from Raoult's law.
(b) Acetone molecules have higher intermolecular attraction due to dipole-dipole interaction. With CS2, this interaction is decreased thus, positive deviation.
(c) Mixture of benzene and toluene forms ideal solution
(d) Phenol and aniline have higher interaction due to intermolecular H-bonding. Hence, negative deviation
