MHT CET 2022 Chemistry question

Which among the following colligative properties is useful to determine molar masses of very expensive solutes ?

(A)Vapour pressure lowering
(B)Osmotic pressureCorrect
(C)Freezing point depression
(D)Boiling point elevation

Answer: (B)

Solution

Osmotic pressure () is large even for very dilute solutions: a solution of only a milligram-scale quantity of solute gives a measurable pressure. It is measured at room temperature (no heating, so heat sensitive molecules are not damaged) and works well for biomolecules and polymers of large molar mass.

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Question ID VK-093985