Q4 of 35 Page 1

How is Brownian movement responsible for the stability of sols?

Brownian movement:


⇒ A British botanist, Robert Brown observed a movement, when colloidal solutions are viewed under a powerful ultramicroscope.


⇒ He saw that the colloidal particles appear to be in a state of continuous zig-zag motion. This motion is known as a Brownian movement.



The Brownian movement has a stirring effect which does not permit the particles to settle and thus, is responsible for the stability of sols (solids in liquids).


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