(i) In thin layer chromatography The lower adsorbing particles come out readily while another having higher adsorbing tendency comes out later. On this basis, compounds are separated or analysed.

(ii) In adsorption indicators Surface of certain precipitate has an ability to adsorb some dyes to produce a characteristic colour e.g., AgX adsorbs eosin dye and thereby producing a characteristic colour at the endpoint.

(iii) In qualitative analysis Specific material has specific adsorption tendency so particular ion can be identified very easily.

(iv) In the separation of inert gases Different inert gases are adsorbed to different extents at different temperatures on coconut charcoal. This forms the basis of their separation from a mixture.