Answer: 1. Highest osmotic pressure : 1 M
2. Lowest osmotic pressure: 1 M

Step-by-step explanation:
= osmotic pressure
i = Van'T Hoff factor
C = concentration
T = Temperature
1. For 1M
, i= 3 as it is a electrolyte and dissociate to give 3 ions.
2. For 1 M
, i= 2 as it is a electrolyte and dissociate to give 2 ions.
3. For 1M
, i= 1 as it is a non electrolyte and do not dissociate.
Thus as vant hoff factor is highest for
thus osmotic pressure is highest for 1 M

And as vant hoff factor is lowest for
thus osmotic pressure is lowest for 1 M
