If a solution exhibits a negative deviation from Raoult's law, the vapor pressure of the solution is __________ what would be expected ideally.
A) equal to
B) greater than
C) less than

Question

Quizplus · Accepted Answer

Negative deviations from Raoult's law occur when the intermolecular forces between unlike molecules in the solution are stronger than those between the same molecules in the pure liquids. This leads to a lower vapor pressure than expected by Raoult's law, thus the vapor pressure of the solution is less than what would be expected ideally.

If a Solution Exhibits a Negative Deviation from Raoult's Law