Question

define the following with an example.
1. diffusion.
2. osmosis.

Answer 1

Diffusion is the movement of a substance from higher concentration to lower concentration. eg. diffusion of potassium permanganate in water.
osmosis is diffusion of water from semipermeable membrane from low solute to high solute concentration. eg- absorption of water from soil by plants

Answer 2

diffusion is a net movement of a substance.example is food colouring.osmosis is the movement of water molecules from higher concentration to lower concentration.an example is dipping a sponge into water.