Mixture(s) showing positive deviation from Raoult's law at 35 o C is (are)

Mixture(s) showing positive deviation from Raoult's law at 35oC is (are)
  1. Carbon tetrachloride + methanol
  2. Carbon disulphide + acetone
  3. Benzene + toluene
  4. Phenol + aniline

Solution

A] H-bonding of methanol breaks when CCl4 is added so bonds become weaker, resulting positive deviation.
B] Mixing of polar and non-polar liquids will produce a solution of weaker interaction, resulting positive deviation
C] Ideal solution
D] -ve deviation because stronger H-bond is formed.

Asked in: JEE Advanced 2016 (Paper 2)

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