Considering the formation, breaking and strength of hydrogen bond, predict which of the following mixtures will show a positive deviation from Raoult s law?

Question

Considering the formation, breaking and strength of hydrogen bond, predict which of the following mixtures will show a positive deviation from Raoult s law? (A) Methanol and acetone (B) Chloroform and acetone (C) Nitric acid and water (D) Phenol and aniline

Tardigrade Admin · Accepted Answer

Mixture of methanol and acetone shows positive deviation from Raoult’s law. In pure methanol, molecules are hydrogen bonded. On adding acetone, its molecules get in between the host molecules and break some of the hydrogen bonds between them.

Q. Considering the formation, breaking and strength of hydrogen bond, predict which of the following mixtures will show a positive deviation from Raoult s law?

Methanol and acetone

Chloroform and acetone

Nitric acid and water

Phenol and aniline

Mixture of methanol and acetone shows positive deviation from Raoult’s law. In pure methanol, molecules are hydrogen bonded. On adding acetone, its molecules get in between the host molecules and break some of the hydrogen bonds between them.