Question

Formula of Osmotic pressure is:

• A. \( \pi = \frac{nRT}{V} \)
• B. \( P = \frac{KT}{V} \)
• C. \( P = \frac{RT}{M} \)
• D. \( \pi = \frac{PV}{T} \)

Hint:

The formula for osmotic pressure is derived from the ideal gas law and applies when a solvent passes through a semipermeable membrane due to a concentration gradient.

Answer 1

The Correct Option is A

Step 1: Formula for osmotic pressure.
Osmotic pressure (\( \pi \)) is the pressure required to stop osmosis. The formula is derived from the ideal gas law and given by: \[ \pi = \frac{nRT}{V} \] where:
- \( n \) is the number of moles of solute,
- \( R \) is the gas constant,
- \( T \) is the temperature in Kelvin,
- \( V \) is the volume of the solution.

Step 2: Conclusion.
The correct formula for osmotic pressure is \( \pi = \frac{nRT}{V} \), which corresponds to option (1).