Question: in which one of the following reactions is h2o2 behaving as a reducing agent?
Answer: Oxidation state of O changes from -1 in H2O2 to 0 in O2. Since it is getting oxidised, therefore it is reducing agent. Oxidation state of O changes from -1 in H2O2 to 0 in O2. Since it is getting oxidised, therefore it is reducing agent.