20. When two liquid A and B are mixed then their boiling points becomes greater than of them. What is the nature of this solution

a. Ideal solution

b. Positive deviation with non ideal solution

c. Negative devitation with non ideal solution

d. Normal solution

Ans. c

Explanation : For the solution with negative deviations there is an intermediate composition for which the vapour pressure of the solution is minimum and hence, boiling point is maximum.