Diffusion- multi ink: A drop of red ink is dropped into a beaker containing clear water. The ink dissolves evenly into the container and a red solution is observed. The process through which molecules move from a region of higher concentration to a region of lower concentration is termed as Diffusion.

Flame Test-Potassium chloride: Potassium Chloride is taken in a spatula and heated under strong flame. The color of the compound changes to Blue.