(I)H₂O₂ +O₃ --> H₂O +2O₂
(II) H₂O₂ +Ag₂O +--> 2Ag +H₂O +O₂
Role of hydrogen peroxide in the above reaction is respectively

• oxidising in (I) and reducing (II)

• reducing (I) and oxidizing in (II)

• reducing in (I) and (II)

• reducing in (I) and (II)

A.

oxidising in (I) and reducing (II)

In the reaction,


since H₂O₂ oxidise, O₃ into O₂ thus it behaves as an oxidising agent.
the further reaction, in the reaction,


Here H₂O₂ reduces Ag₂O into metallic silver [Ag] (as oxidation number is reducing from +1 to 0).Thus, H₂O₂ behaves as a reducing agent.