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A 5% solution of cane sugar (M.W. = 342)...

A 5% solution of cane sugar (M.W. = 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
Given that, `pi_("cane sugar") = pix`
`C_1RT=C_2RT`
`C_1 = 5/(342/V), C_2=1/(M_x/V) implies 5/342 =1/M_x , M_x = 342/5= 68.4`
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