Solutions Question 298

Question: A solution of urea contain 8.6 gm/litre (mol. wt. 60.0). It is isotonic with a 5% solution of a non-volatile solute. The molecular weight of the solute will be [MP PMT 1986]

Options:

A) 348.9

B) 34.89

C) 3489

D) 861.2

Show Answer

Answer:

Correct Answer: A

Solution:

For two non-electrolytic solution if isotonic, $ C_1=C_2 $ \ $ \frac{8.6}{60\times 1}=\frac{5\times 1000}{m.,wt.\times 100} $ \ $ m=348.9 $



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