Question

When a substance is dissolved in a solvent, the vapour pressure of solvent decreases. It brings.

• A. A decrease in boiling point of solution
• B. An increase in boiling point of the solution
• C. A decrease in freezing point of the solution
• D. An increase in freezing point of the solution

Answer 1

Answer: (B)

An increase in boiling point of the solution

Answer 2

As we know that

Boiling point $\propto \frac { 1 } { \text { vapour pre ssure of liquid } }$

Hence, on decreasing vapour pressure, boiling point will increase.