Solutions Question 50

Question: $ 0.6,g $ of a solute is dissolved in $ 0.1,litre $ of a solvent which develops an osmotic pressure of 1.23 atm at $ 27^{o}C $ . The molecular mass of the substance is [BHU 1990]

Options:

A) $ 149.5,g,mol{e^{-1}} $

B) $ 120,g,mol{e^{-1}} $

C) $ 430,g,mol{e^{-1}} $

D) None of these

Show Answer

Answer:

Correct Answer: B

Solution:

$ m=\frac{wRT}{PV}=\frac{0.6\times 0.082\times 300}{1.23\times 0.1}=120 $



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