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A 5% (w/V ) solution of cane sugar (mole...

A 5% (w/V ) solution of cane sugar (molecular mass = 342) is isotonic with 1% (w/V) solution of a subtance X. The molecular mass of X is :

A

`171.2 g mol ^(-1)`

B

`68.4 g mol ^(-1)`

C

`136.2 gmol ^(-1)`

D

`342 g mol ^(-1)`

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The correct Answer is:
B
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