Question

If semipermeable membrane is placed between the solvent and solution as shown in the given figure then :

• A. the solvent molecules will flow through the membrane from solution to pure solvent
• B. the solvent molecules will flow continuously till the equilibrium is attained
• C. the flow of the solvent from solvent side to solution side across a semipermeable membrane can be stopped if some extra pressure (called osmotic pressure) is applied on the solution
• D. both (B) and (C)

Answer 1

Answer: (D)

both (B) and (C)

In the given system, Solvent molecules will flow continuously until equilibrium is attained. The flow of solvent from the solvent side to solution side across the semi-permeable membrane can be stopped if some extra pressure (osmotic pressure) is applied to the solution.

Osmotic pressure is the minimum external pressure that must be applied on solution to prevent osmosis.

$\Pi =hpg$

$\Pi =$ Osmotic pressure.