Raoult's law is used to estimate the contribution of individual components of a liquid or solid mixture to the total pressure exerted by the system. (A) Phenol and aniline A solution of phenol and aniline will show negative deviation from Raoult's law. In case of negative deviations from Raoult's law, A−B forces are stronger than A−A and B−B forces. In phenol and aniline amount of H-bonding increase due to increase in number of hydrogen atoms of aniline. (B) Chloroform and acetone A solution of chloroform and acetone shows negative deviation from Raoult's law because they have an attractive interaction happening between them which results in the formation of hydrogen bonding. That's why they show negative deviation from Raoult's law.
Both the solutions i.e. A and B, shows negative deviation.