devarshi-dt-logo

Question:

Mixture(s) showing positive deviation from Raoult's law at 35°C is(are): Carbon disulphide + acetone, Carbon tetrachloride + methanol, Benzene + toluene, Phenol + aniline

Carbon disulphide+acetone

Carbon tetrachloride+methanol

Benzene+toluene

Phenol+aniline

Solution:

(A) CCl4 + CH3OH → Positive deviation from Raoult's law. Here, H-bonding in methanol is broken by CCl4 (B) image : Mixing of polar and non-polar liquids will produce a solution of weaker interaction, resulting positive deviation (C) C6H6 + C7H8 → Ideal solution (D) image : Here stronger H-bonding is formed leading to negative deviation.