# What is the oxidation number of chlorine?

##### 1 Answer

Oct 26, 2015

#### Answer:

It is not fixed, it may be +1, +3, +5 and +7

#### Explanation:

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