Question

effect of impurities on the boiling point and freezing point of water

Answer 1

When we boli some liquid the harful substance die

Answer 2

Impurities results in making of more bonds in the water or in any substance which means we have to apply more energy to break that bond on heating which means it would gain in boling point but in the case of freezing it we have to not apply much effort because if there's impurities then there molecular bonds will be to close