Question

A solution containing 10 g per `dm^(3)` of urea (molecular mass = 60 g `mol^(–1)`) is isotonic with a 5% solution of a nonvolatile solute. The molecular mass of this nonvolatile solution is:
A. `350 g mol^(-1)`
B. `200 g mol^(-1)`
C. `250 g mol^(-1)`
D. `300 g mol^(-1)`

Answer 1

Correct Answer - D
`C_(1)RT=C_(2)RT` (`C_(1)` and `C_(2)` in mole/litre)
`(10)/(60)=(50)/(m)rArr m=300`