A solution containing 8.6 g urea in one litre was found to be isotonic with a 5% (wt./vol.) solution of an organic non-volatile solute. The molecular weight of latter is :
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a
348.9
b
34.89
c
3489
d
861.2
answer is A.
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Detailed Solution
For two non-electrolytic solutions if isotonic C1=C2∴ 8.660×1=5×1000m×100 ∴ m=348.9
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A solution containing 8.6 g urea in one litre was found to be isotonic with a 5% (wt./vol.) solution of an organic non-volatile solute. The molecular weight of latter is :