JEE Main Chemistry question

Camphor is often used in molecular mass determination because [Manipal 2007]

(A)It is readily available
(B)It has a very high cryoscopic constantCorrect
(C)It is volatile
(D)It is solvent for organic substances

Answer: (B)

Solution

Rast's method determines molecular mass from freezing-point depression; camphor is chosen as the solvent because its molal depression constant ( K kg mol) is unusually large, so even a small amount of solute produces an

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Question ID VK-130497