Question

If the non-volatile impurities contaminate the liquid, its boiling point gets ____________

(a) Depressed

(b) Elevated

(c) Remains same

(d) None of the mentioned

I have been asked this question in an interview.

My enquiry is from Boiling Point in section Criteria of Purity and Characterisation of Materials of Engineering Chemistry I

Answer 1

The correct answer is (b) Elevated

To elaborate: If the non-volatile impurities contaminate the liquid, its boiling point gets elevated. This is one of the most important colligative property. Example: salt water boils at a higher temperature than pure water.