JEE Main Chemistry question

Which one of the statements given below, concerning properties of solutions, describes a colligative effect?

(A)Vapour pressure of pure water decreases by the addition of nitric acidCorrect
(B)Boiling point of pure water decreases by the addition of ethanol
(C)Boiling point of pure benzene increases by the addition of toluene
(D)Vapour pressure of pure benzene decreases by the addition of naphthalene

Answer: (A)

Solution

A colligative effect is produced specifically when a solute lowers the vapour pressure (or correspondingly changes the boiling/freezing point) of the solvent in proportion to the amount of solute added, as described for

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Question ID VK-143196