It reacts with alkalies and decomposes carbonates. The bleaching action of H 2O 2 is due to oxidation. Hydrogen peroxide acts as bleaching agent. Hydrogen peroxide acts as an reducing agent in neutral, acidic or in alkaline medium. PbS + 4H 2O 2 PbSO 4 + 4H 2O (in neutral solution) FeSO 4 + H 2SO 4 + H 2O 2 Fe 2SO 4 3 + 2H 2O (in acidic solution) MnSO 4 + H 2O 2 + 2NaOH MnO 2 + Na 2SO 4 + 2H 2O (in alkaline solution) It acts as an oxidising agent in neutral, acidic or in alkaline medium. Hydrogen peroxide is a powerful oxidising agent.
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