Keeping in mind the concepts of oxidation and reduction, identify the correct statement.
1
HCl is a weak reducing agent than HBr and I2 is a stronger oxidising agent than Br2.
2
The oxidation state of Sulphur in sodium thiosulphate is in fraction, while in sodium tetrathionate it is a whole number.
3
The oxidizing power of halogens is directly proportional to their electrode potential.
4
All of the above