The zig-zag motion (erratic motion) of particles in colloid was observed by :

Tyndall

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Zsigmondy

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Robert brown

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Thomas Graham

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Solution

The correct option is C
Robert brown

The continuous random motion of the particles in a colloidal solution is called Brownian movement. Scottish botanist Robert Brown observed the movement of pollen grains in water.

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The zig - zag motion exhibited by the colloidal particles is known as:

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