Question

A solution of two volatile components showing negative deviation from Raoult’s law shows:- 

(1) Decrease in vapour pressure, boiling point increases

(2) Increase in vapour pressure boiling point decreases

(3) Decrease in vapour pressure, boiling point decreases

(4) Increase in vapour pressure boiling point increases

Answer 1

The correct option (1) Decrease in vapour pressure, boiling point increases.

In case of negative deviation from Raoult’s law the vapour pressure is less than expected from Raoult’s law and B.P. is more.