Which of the following oxy acid of sulphur has +6 oxidation state for sulphur?
Sulphurous acid
preoxydisulphuric acid
Thiosulphuric acid
Sulphuric acid
Peroxydisulphuric acid (H2S2O8) has +6 oxidation state of sulphur.
Sulphur in sulphuric acid has an oxidation number of :