MHT CET Chemistry question

Which one of the statements given below concerning properties of solutions describes a colligative effect? [AIIMS 2003]

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

Answer: (C)

Solution

Colligative properties arise from a non-volatile solute lowering the solvent's vapour pressure; naphthalene in benzene fits this, whereas ethanol (volatile, lowers the boiling point) and

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Question ID VK-061145