11. A 5.25% solution of a substance is isotonic with a 1.5 % solution of urea in the same solvent. If the densities of both the solutions are assumed to be equal to 1.0
gcm-3 , molar mass of the substance will be
a. 90.0 g mol -1
b. 115.0 g mol -1
c. 105.0 gmol -1
d. 210.0 gmol -1
Ans. d
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