Question

Why does the osmosis is known as the special case of diffusion

Answer 1

Osmosis is the special case of diffusion involving water molecules. Water molecules move from areas of high water concentration to areas of low water concentration through a selectively permeable membrane.


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Answer 2

We know, diffusion is a physical process that refers to the net movement of molecules from a region of high concentration to one of lower concentration.
Similarly,
a process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one is known as osmosis.