Assuming each salt to be 90% dissociated, which of the following will have highest osmotic pressure?
a. decinormal Al2(SO4)3
b. decinormal BaCl​2
c. decinormal Na2SO4
d. all of the above

Osmotic pressure is a colligative property and depends on the Van't Hoff factor, i.
i has the highest value for Al2(SO4)3 as it dissociates to give 5 ions and therefore the osmotic pressure would be highest for solution containing decinormal  Al2(SO4)3

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