It is the branch of science which deals with the study of the phenomena occurring at the surface or interface, I.e, .at the boundary separating two bulk phases
Ultra clean surface- of metal is obtained when a high vaccum of the order of 10-8 to 10-9 pascal is applied on them ,useful for the reaction which take place in absence of air
Adsorption – is a process of accumulation of molecular species at the surface rather than in the bulk of a solid or liquid
Example-
Charcoal adsorbs –gases such as O2,H2,CO,Cl2,NH3,SO2
Animal charcoal adsorbs all colour present in organic dye as methylene blue or in raw sugar
Silica gel adsorbs water vapour or moisture
Adsorbate- is the molecular species or substance which concentrates or accumulates at the surface
Adsorbent-is the material on the surface of which the adsorption takes place
Desorption- removal of adsorbed substance from the surface of adsorbent
Sorption- involving both adsorption and absorption.
Absorption –is process in which substance is uniformly distributed throughout the bulk of solid
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