Question

why boiling point increases due to the presence of dissolved impurities in it?​

Answer 1

Explanation:

the boiling point increases as more heat is needed to change the state of matter of two or more substances

Answer 2

So, when the impurity is added, vapour pressure is reduced, and thus, more heat needs to be supplied to raise it to the external pressure and make the mixture boil. Hence, presence of soluble impurities increases the boiling point of liquids.