The electrolyte having the same value of Van't Hoff factor (i) as that of Al2(SO4)3 (if all are 100% ionized) is:
| 1. | K2SO4 | 2. | K3[Fe(CN)6] |
| 3. | Al(NO3)3 | 4. | K4[Fe(CN)6] |
A solution containing 10 g/dm3 of urea (molecular mass = 60 g mol-1) is isotonic with a 5 % solution of a non-volatile solute. The molecular mass of this non-volatile solute is:
| 1. | 25 g mol-1 | 2. | 300 g mol-1 |
| 3. | 350 g mol-1 | 4. | 200 g mol-1 |