Question
What is the difference between osmosis and diffusion?
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Answer
(a) Difference between Osmosis and Diffusion
| Osmosis | Diffusion | |
| 1. | The process of osmosis takes place through a semi-permeable membrane. | In diffusion, no semi-permeable membrane is required. |
| 2. | The process of osmosis involves the movement of the solvent molecules in one direction only. | In diffusion both the solute and the solvent molecules can move but in opposite direction. |
| 3. | In osmosis, molecules of solvent move from a region of lower concentration of solute into a region of higher concentration | In diffusion, the molecules (solute and solvent) move from a region of higher concentration into a region of lower concentration. |
| 4. | Osmosis can be stopped or reversed by applying addi-tional pressure on the side of higher concentration. | It cannot be prevented or stopped. |
| 5. | The process of osmosis is common in liquids. | The process of diffusion is common in liquid as well as in gases. |
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