Question

Give reason for increase and decrease in boiling point of a solvent on addition of a volatile and non volatile solute

Answer 1

vapour pressure of a solvent decreasea on adding a non volatile solute because of decrease in escaping tendency of solvent molecules from the surface of the solution as some of the area is occupied by non volatile solute.

Answer 2

Hey!!!

Here is your answer___________


The boiling point of the solution is higher because the nonvolatile solute lowers the vapor pressure of the solvent. Thus, the temperature must be increased to a value greater than the boiling point of the pure solvent to achieve a vapor pressure equal to atmospheric pressure.

------------------------------------------------------

Hope this answer will help u....