MHT CET Chemistry question

When a substance is dissolved in a solvent, the vapour pressure of the solvent is decreased. This results in

(A)An increase in the boiling point of the solutionCorrect
(B)A decrease in the boiling point of the solution
(C)No change in the boiling point of the solution
(D)A decrease in the boiling point followed by an increase in the boiling point of the solution

Answer: (A)

Solution

A lower vapour pressure means a higher temperature is needed for it to equal the external pressure, so

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Question ID VK-061017