Question

how can you explain diffusion by the help of an activity?

Answer 1

diffusion is the process which helps to give entry to only selected molecules through any membrane.
eg. High conc. and low conc. soln. in a beaker and place semipermeable wall between them then high conc. soln will pass through wall (only solvents) to attain equllibrium.

Answer 2

diffision is the process in which solute/solvent/gaseous particles move from the region of higher concentration to lower concentration we can explain this by an activity

such that if if we take a clean beaker and pour 100 ml of water into it and then add 10 ml of potasium permagnate into it so afyer some time the water would turn purple in colour due to the process if diffusion in liquids

and also if we take "aggarbati" and place it in one corner of the room the fragrance would spread throughout the room after some time this is known as diffusion in gases

please try both of the experiments