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i) H2O2 + O3 → H2O + O2 (ii) H2O2 + Ag2O → 2Ag + H2O + O2 Role of hydrogen peroxide in the above reactions is respectively -

1. (a) Oxidizing in (i) and reducing in (ii)
2. (b) Reducing in (i) and oxidizing in (ii)
3. (c) Reducing in (i) and (ii)
4. (d) Oxidizing in (i) and (ii)

Correct answer: (a) Oxidizing in (i) and reducing in (ii)

Solution

In reaction (i), H2O2 oxidizes O3 to O2, acting as an oxidizing agent. In reaction (ii), H2O2 reduces Ag2O to metallic Ag, acting as a reducing agent.

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