Answer:
To demonstrate
motion of particles in air:
(a) Place few lighted incense sticks in
a corner of a room.
(b) Move about the room and smell the
fragrance of the incense sticks.
The fragrance produced due to burning
of incense sticks is due to movement of vapours produced rapidly in all
directions.
To demonstrate motion of particles of
solid matter:
(a) Drop a crystal of copper sulphate
or potassium permanganate into a glass of hot water.
(b) Do not stir the solution and allow
the crystals to settle at the bottom.
(c) The colour of the solid is seen
spreading slowly. This is because the solid particles diffuse in the water.
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