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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

`350 g mol^(-1)`

B

`200 g mol^(-1)`

C

`250 g mol^(-1)`

D

`300 g mol^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
D
For isotomic solutions of two non-electrolytes.
`C_(1)=C_(2)`
`(10)/(60 xx 1000) = (5)/(m xx 100) (1 dm^(3) = 1000 cm^(3))`
`:. m = 300g mol^(-1)`
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