Question

The osmotic pressure of a solution depends on

• A. Temperature.
• B. Nature Of Solvent
• C. Molar Concentration Of Solute.
• D. Both A and C.

Answer 1

The correct option is D

Both A and C.

Explanation for correct option

(D)Both A and C.

Osmotic pressure

• The flow of the solvent from its side to the solution side across a semipermeable membrane can be stopped if some extra pressure is applied on the solution. This pressure that just stops the flow of solvent is called the osmotic pressure of the solution.
• The expression for osmotic pressure is as follows:-
• $\pi =iCRT$
• Here, $\mathrm{\pi }$ is the osmotic pressure, i, known as the van’t Hoff factor, to account for the extent of dissociation or association, $C$ is the concentration, $R$ is the gas constant, and $T$ is the temperature.

Dependence of osmotic pressure

• Osmotic pressure is a colligative property as it depends on the number of solute molecules and not on their identity.
• For dilute solutions, it has been found experimentally that osmotic pressure is proportional to the molarity, $C$ of the solution at a given temperature T.

Hence, the osmotic pressure of a solution depends on the temperature and molar concentration of the solute.

Explanation for incorrect option

The osmotic pressure of a solution depends on both “the temperature and molar concentration of the solute.”Hence, options (A), (B), and (C) are incorrect.

Hence, option (D) is correct. The osmotic pressure of a solution depends on the temperature and molar concentration of the solute.