Mixture(s) showing positive deviation from Raoult's law at 35 °C is(are)
← JEE Advanced 2016 · Paper 2
ChemistryMultiple correct+4 / -2Question 26 of 54
JEE Advanced 2016 · Paper 2, Chemistry question 26
Answer and worked solution
Official answer: A, B
Positive deviation happens when A-B attractions are weaker than A-A and B-B attractions.
- CCl₄ + methanol: breaking methanol's H-bonds. Positive.
- CS₂ + acetone: breaking acetone's dipole-dipole interactions. Positive.
- Benzene + toluene: nearly ideal.
- Phenol + aniline: a strong O-H···N bond forms. Negative deviation.
(A), (B)