In the chemical reaction Cl2+H2S⟶2HCl+S, the oxidation number of sulphur changes from
0 to 2
2 to 0
- 2 to 0
- 2 to - 1
The oxidation state of sulphur in H2S is−2, while it is zero in 'S' i.e. in this reaction oxidation of sulphur and reduction of chlorine takes place.
In the conservation Br2⟶BRO−3, the oxidation state of bromine changes from
whenSO2 is passed in a solution of potassium iodate, the oxidation state of iodine change's from :