Chemistry - Liquid Solution Question with Solution | TestHub

Osmotic pressure is a colligative property given by the expression $\pi =CRT$, where $C$ is the molar concentration of the solution, $R$ is the gas constant, and $T$ is the absolute temperature.

From this expression, it is evident that osmotic pressure is directly proportional to the concentration of the solution ($C$) at a given temperature.

Since $C=\frac{n}{V}$, where $n$ is the number of moles of solute, osmotic pressure is directly proportional to the number of moles of solute.

It is also directly proportional to the absolute temperature ($T$).

Thus, the only true statement is that osmotic pressure is directly proportional to the concentration of the solution.

Answer: It is directly proportational to the concentration of solution.