Question

what is elevation of boiling point????

Answer 1

If you boil water then it will start boiling at 100 C. But if you add anything to the water then it will not boil at 100 C, it will boil at little bit higher temperature for example 101-103 C. This is because when you add something to a liquid it's vapor pressure lowers and to boil something the vapor pressure must be equal to the atmospheric pressure. So to attain high vapor pressure you need to give it high temperature.

Answer 2

Boiling-point elevation describes the phenomenon that the boiling point of a liquid (a solvent) will be higher when another compound is added, meaning that a solution has a higher boiling point than a pure solvent. This happens whenever a non-volatile solute, such as a salt, is added to a pure solvent, such as water.