1.

What is meant by Brownian movement?

Answer»

SOLUTION :(i) Robert Brown observed that when the pollen grains suspended in WATER were viewed through an ultra microscope, they showed a RANDOM, zigzag, ceaseless motion. This is called Brownian movement of colloidal particles.
(ii) The colloidal sol particles are continuously BOMBARD with the MOLECULES of dispersion medium and hence they follow a zigzag, random, continuous movement.


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