The Influence Of Pressure And Of Dissolved Substances On Boiling And Melting Points - Physics Jamb Past Questions and Answers

Question 1 :

• JAMB 2021

I. A liquid boils when its saturated vapor pressure is equal to the external pressure
II. Dissolved substances in pure water lead to an increase in the boiling point.
III. When the external pressure is increased, the boiling point increases.
IV. Dissolved substances in pure water decreases the boiling point

Which of the above combinations are peculiarities of the boiling point of a liquid?

A. I, II and III only
B. I, II, III, and IV
C. I, II, and IV
D. II, III, and IV