Question

54. (a) What is Brownian motion ? Draw a diagram to show the movement of a particle (like a pollen grain)
during Brownian motion.
(b) In a beam of sunlight entering a room, we can sometimes see dust particles moving in a haphazard way
in the air. Why do these dust particles move?
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Answer 1

Answer:

random motion of molecules is called brownian motion.

Answer 2

Answer:

the random or zig Zag movement of colloidal particles