Which of the following equations depict the oxidising nature of H2O2?

1. 2MnO4-+6H++5H2O22Mn2++8H2O+5O2

2. 2Fe3++2H++H2O22Fe2++2H2O+O2

3. 2I-+2H++H2O2I2+2H2O

4. KIO4+H2O2KIO3+H2O+O2