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Question

Odour spreads from one room to another by the process of:


  1. Separation

  2. Osmosis

  3. Expansion

  4. Diffusion


Solution

The correct option is D

Diffusion


Odour spreads from one room to another by the process of diffusion. Diffusion is the net movement of molecules from a region of its high concentration to a region of its low concentration. In other words, it is the movement of a substance down a concentration gradient.

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