Which of the following associated with isotonic solutions is not correct

Options

A. They will have the same osmotic pressure
B. They have the same weight concentrations
C. Osmosis does not take place when the two solutions are separated by a semipermeable membrane
D. They will have the same vapour pressure

Answer

D

Explanation

Vapour pressure depends on the interaction between molecules of solute and solvent whereas osmotic pressure depends on the concentration of solute only.