Chlorine is in +1 oxidation state in
HCl
HClO4
ICl
Cl2O
In case of Cl2O chlorine shows +1 oxidation state.
How do we know that in the given chemical equations what is the oxidation state of chlorine as chlorine can have +7,+5,+1,+3 and -7 as it's oxidation state
KclO3----- k+1cl-1 . +O2