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A solution containing 10 g per dm^(3) of...

A solution containing `10 g per dm^(3)` of urea (mol.wt. `= 60 g mol^(-1)`) is isotonic with a `5%` ( mass//vol.) of a non-volatile solute. The molecular mass of non-volatile solute is:

A

`"300 g mol"^(-1)`

B

`"350 g mol"^(-1)`

C

`"200 g mol"^(-1)`

D

`"250 g mol"^(-1)`

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The correct Answer is:
A
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