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At certain temperature 1.6% solution of ...

At certain temperature 1.6% solution of an unknown substance is isotonic with 2.4% solution of Urea. If both the solutions have the same solvent and both the solutions have same density 1 gm/c`m^3`, what will be the molecular mass of unknown substance in gm/mol.
[Molecular mass of urea = 60 gm/mol]

A

30

B

40

C

80

D

90

Text Solution

Verified by Experts

The correct Answer is:
B
`1.6/M = 2.4/60`
`rArrM=1.6/2.4 xx 60=40g//mol`
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