Question

define
(a) diffusion
(b) brownian motion
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Answer 1

Explanation:

(a) Diffusion: The Intermixing of two or more substances due to the motion of their particles in order to get a uniform mixture is called 'diffusion'. (b) Brownian motion: The haphazard, random motion of suspended particles on the surface of a liquid or in air is called 'Brownian motion'.