Question

In an experimental set-up, a dye was placed at the bottom of a beaker filled with water as shown in figure A, below. After some time, the entire water in the beaker got coloured uniformly, as shown in figure D.
(a) Name and define the phenomenon shown in the experiment.

Answer 1

The phenomenon is diffusion. Diffusion is the movement of the molecules or atoms of a substance from the region of higher concentration to the region of lower concentration.