Osmotic pressure is the pressure that stops the flow of a solvent and is related to the volume as:

Inversely proportional to the volume.

The correct answer is option 2. Inversely proportional to the volume.

Osmotic pressure is inversely proportional to the volume of the solvent.

Imagine a semipermeable membrane separating a solution (high solute concentration) from a solvent (pure solvent). Osmosis is the natural tendency of the solvent to move across the membrane to dilute the solution and reach equilibrium on both sides.

Higher volume of solvent: If you have a larger volume of solvent on one side of the membrane, there are more solvent molecules available to move towards the solution side. This creates a lower pressure difference (osmotic pressure) required to stop the net flow of solvent.

Lower volume of solvent: Conversely, with a smaller volume of solvent, there are fewer solvent molecules to move. This leads to a higher pressure needed on the solution side to balance the tendency of the fewer solvent molecules to move towards the concentrated solution.

Therefore, as the volume of the solvent increases, the osmotic pressure exerted by the solvent decreases, making them inversely proportional.