Question

what is brownian movement? why it occurs in colloidal solution​

Answer 1

Answer:

The phenomenon of Brownian motion was observed by Robert Brown in the form of random zig-zag motion of pollen grains suspended in water. This kind of movement is found in all colloidal systems. Such random motion is visible under ultramicroscopes and for bigger particles even under ordinary microscopes.

Explanation:

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Answer 2

Answer:

This refers to the random and erratic movement of microscopic particles that are suspended in any fluid, like water or oil. Brownian motion is the result of the impact of the random bombardment of microscopic particles by the variety of fast-moving molecules that constitute the fluid.