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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

(8)

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