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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

74.2

B

138.4

C

68.4

D

171.2

Text Solution

Verified by Experts

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