In which of the following reactions H2O2 acts as a reducing agent? 1. H2O2 + 2H+ + 2e- $\to$ 2H2O 2. H2O2 - 2e- $\to$ O2 + 2H+ 3. H2O2 + 2e- $\to$ 2OH- 4. H2O2 + 2OH- - 2e- $\to$ O2 + 2H2O

Question

In which of the following reactions H₂O₂ acts as a reducing agent?
1. H₂O₂ + 2H⁺ + 2e^- $\to$ 2H₂O
2. H₂O₂ - 2e^- $\to$ O₂ + 2H⁺
3. H₂O₂ + 2e^- $\to$ 2OH^-
4. H₂O₂ + 2OH^- - 2e^- $\to$ O₂ + 2H₂O