Osmotic pressure is the minimum pressure which needs to be applied to a solution to prevent the inward flow of its pure solvent across a semipermeable membrane.It is a colligative property.

$$\begin{gathered} \mathrm{\pi }=\mathrm{CRT} \\ \mathrm{Where},\mathrm{\pi }=\mathrm{Osmotic} \mathrm{pressure} \\ \mathrm{C}=\mathrm{Molarity} \\ \mathrm{T}=\mathrm{Temperature}. \end{gathered}$$

$$\begin{gathered} \mathrm{\pi }=\mathrm{CRT}=\left[\frac{2\times {10}^3}{60\times {10}^3\times 200}\right]\times 8.31\times \mathrm{300\; \times \; 1000} \\ =415{\mathrm{P}}_{\mathrm{a}} \end{gathered}$$