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A 5% solution of cane sugar (molecular w...

A `5%` solution of cane sugar (molecular weight=342) is isotonic with `1%` solution of substance `X`. The molecular weight of `X` is

A

171.2

B

68.4

C

34.2

D

136.2

Text Solution

Verified by Experts

The correct Answer is:
B
Being isotonic , molar concentration of cane sugar= molar concentration of substance X
`5/342xx1000/100=1/x xx 1000/100` (let the molecular weight of X =x )
x=`342/5`=68.4
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