Question

Which of the following is correct during osmosis?

• A. Solvent molecules move from higher to lower concentration
• B. Solvent molecules move from lower to higher concentration
• C. Solute molecules move from higher to lower concentration
• D. Solute molecules move from lower to higher concentration

Answer 1

The correct option is B Solvent molecules move from lower to higher concentration

Osmosis:
The spontaneous flow of solvent particles from lower to higher solute concentration through a semi-permeable membrane (SPM).
SPM - A membrane which allows only solvent particles to pass through it.
The flow will continue till an equilibrium is attained
In diffusion : Solute molecules move from high to low concentration

Theory :
Reverse osmosis
If the pressure applied on the solution side is more than osmotic pressure of the solution
The solvent particles move from solution to solvent side