Question

How Osmosis - a special case of diffusion?¡!¡

Answer 1

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→ Diffusion is a net movement of particles of substances from its higher concentration to its lower concentration.

In osmosis, movement of water occurs but across a semi permeable membrane.

Here, in this case, also movement takes place from higher to lower concentration obeying the rules of diffusion.

The speciality is this the movement is only of water. So it seems a special case of diffusion in which water moves across a semi permeable membrane.

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Answer 2

Answer:

Diffuson is the flow of substances from a high concenteration region to a low concentration region.

Osmosis is the flow of water from a high concentration region to a low concentration region through a semi permeable membrane.

Osmosis is a special case of diffusion as it has specified the 'substance' to be water and it also sets a condition where water has to pass a semi permeable membrane.

Both are passive processes as no expenditure of energy is involved .