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what is meant by diffusion?
If a bottle of perfume is opened in one corner of a room, it spreads in the whole room by diffusion. If you drop a little ink in a beaker of water it will spread by itself in the beaker of water and the color spreads uniformly.

Diffusion is the natural process of intermingling of the molecules of two substances. The rate of diffusion in gases is inversely proportional to the square root of their densities.

 


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