Question

A difference between diffusion and osmosis is :

• A. A semi-permeable membrane is required for osmosis while diffusion requires no semi-permeable membrane.
• B. In osmosis movement of molecules is only in one direction whereas in diffusion movement is on both sides.
• C. In osmosis only the solvent moves while in diffusion both solute and solvent move.
• D. None of the above.

Answer 1

Answer: (A), (B), (C)

The correct options are
A A semi-permeable membrane is required for osmosis while diffusion requires no semi-permeable membrane.
B In osmosis movement of molecules is only in one direction whereas in diffusion movement is on both sides.
C In osmosis only the solvent moves while in diffusion both solute and solvent move.

Difference between Osmosis and DIffusion: Any type of substance moves from area of highest energy or concentration to region of lowest energy or concentration.	Only water or another solvent moves from a region of high energy or concentration to a region of lower energy or concentration.
Diffusion can occur in any medium, whether it is liquid, solid, or gas.	Osmosis only occurs in a liquid medium.
Diffusion does not require a semipermeable membrane.	Osmosis requires a semipermeable membrane.
Concentration of the diffusion substance equalizes to fill the available space.	Concentration of solvent does not become equal on both sides of the membrane.
Hydrostatic pressure and turgor pressure to not normally apply to diffusion.	Hydrostatic pressure and turgor pressure oppose osmosis.
Does not depend on solute potential, pressure potential, or water potential.	Depends on solute potential.
Diffusion mainly depends on the presence of other particles.	Osmosis mainly depends on the number of solute particles dissolved in the solvent.
Diffusion is a passive process.	Osmosis is also a passive process.
The movement in diffusion is to equalize concentration (energy) throughout the system.	The movement in osmosis seeks to equalize solvent concentration (although it does not achieve this).

Hence, options A, B and C are correct