(i) `H_2 O_2 + O_2 to H_2 O + 2O_2 `
(ii) `H_2 O_2 + Ag_2 O to 2Ag + H_2 O + 2O_2`
Role of hydrogen peroxide in the above reactions is respectively

Explanation

To determine the role of hydrogen peroxide (H₂O₂) in the given reactions, we need to analyze each reaction step by step, focusing on the oxidation states of the elements involved.

### Step-by-Step Solution:

**(i) Reaction: H₂O₂ + O₂ → H₂O + 2O₂**

1. **Identify the oxidation states:**
- In H₂O₂ (hydrogen peroxide), the oxidation state of O is -1.
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