Hydrogen peroxide is a powerful oxidising agent, both in the acidic and alkaline medium.
In acidic medium: `H_(2)O_(2)+2H^(o+)+2e^(ɵ)to2H_(2)O`
In alkaline medium: `H_(2)O_(2)+2e^(ɵ)to2overset(Theta)(O)H`
Hydrogen peroxide acts as a reducing agent towards powerful oxidising agents.
In acidic medium: `H_(2)O_(2)to2H^(o+)+O_(2)+2e^(ɵ)` In alkaline medium, however, its reducing nature is more effective.
`H_(2)O_(2)to2H^(o+)+O_(2)+2e^(ɵ)`
In the reaction, `H_2O_2 + O_3 to H_2O + 2O_2, H_2O_2` behaves as

Options

A. an oxdising agent
B. reducing agent
C. acid
D. base

Explanation

To determine the behavior of hydrogen peroxide (H₂O₂) in the reaction with ozone (O₃) to form water (H₂O) and oxygen (O₂), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants and Products**:
- The reaction is:
\[ \text{H}_2\text{O}_2 + \text{O}_3 \rightarrow \text{H}_2\text{O} + 2\text{O}_2 \]
- Here, the reactants are hydrogen peroxide (H₂O₂) and ozone (O₃), while the products are water (H₂O) and oxygen (O₂).

2. **Determine the Oxidation States**:
- In H₂O₂, the oxidation state of oxygen is -1.
- In H₂O, the oxidation state of oxygen is -2.
- In O₃, the oxidation state of oxygen is 0 (since it is in its elemental form).
- In O₂, the oxidation state of oxygen is 0.

3. **Analyze the Changes in Oxidation States**:
- For H₂O₂:
- The oxidation state of oxygen changes from -1 in H₂O₂ to -2 in H₂O.
- This indicates that the oxidation state of oxygen in H₂O₂ is decreasing, which means H₂O₂ is losing electrons.
- For O₃:
- The ozone (O₃) is being reduced to O₂, indicating that it is gaining electrons.

4. **Determine the Role of H₂O₂**:
- Since H₂O₂ is losing electrons (decreasing its oxidation state), it is acting as a reducing agent.
- In contrast, ozone (O₃), being a strong oxidizing agent, is gaining electrons.

5. **Conclusion**:
- Therefore, in the reaction between H₂O₂ and O₃, hydrogen peroxide behaves as a reducing agent.

### Final Answer:
Hydrogen peroxide (H₂O₂) behaves as a **reducing agent** in the reaction with ozone (O₃).