Q. 25

Write chemical reactions to justify that hydrogen peroxide can function as an oxidising as well as reducing agent.

Answer :

Hydrogen peroxide, H2O2 can act as an oxidizing as well as a reducing agent in both acidic and alkaline media.

Reactions involving oxidizing actions are:


(i) PbS + H2O2 PbSO4 + H2O


(ii) 2F+2 + H2O2 2F+3 + 2OH-


Reactions involving reduction actions are:


(i) MnO4- + H2O2 2Mn+2 + 8H2O + 5O2


(ii) HOCl + H2O2 H3O+ + Cl- + O2


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