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| 1. |
Explain why boiling point of solution is greater than that of pure solvent ? |
| Answer» Solution :When a non volatile solute is added to a pure solvent at its BOILING point, the vapour PRESSURE of the solution is LOWERED below 1 atm. To BRING the vapour pressure again to 1 atm the TEMPERATURE of the solution has to be increased. As a result, the solution boils at a higher temperature `(T_(b))` than the boiling point of the puire solvent `T_(b) ^(@)).` This increase in the boiling point is known as elevation of boiling point `Delta T_(b) =T_(b)-T_(b)^(@).` | |