What is the oxidation number of chlorine?
Oct 26, 2015
It is not fixed, it may be +1, +3, +5 and +7
In Hypocholorous acid HOCl , O.N of Cl is +1
In Chlorous acid, HClO2, O.N is +3
In Chloric acid HClO3, its O.N is +5. and
In Perchloric acid HClO4, ON is +7