`H_(2)O_(2)` can act as

Options

A. Oxidising agent
B. Reducing agent
C. Bleaching agent
D. All of these

Answer

To solve the question "H₂O₂ can act as," we will analyze the properties and reactions of hydrogen peroxide (H₂O₂) to determine its roles.

### Step-by-Step Solution:

1. **Understanding Hydrogen Peroxide (H₂O₂)**:
- Hydrogen peroxide is a chemical compound with the formula H₂O₂. It is known for its strong oxidizing properties.

2. **Oxidizing Agent**:
- H₂O₂ can act as an oxidizing agent. This means it can accept electrons from other substances, causing those substances to be oxidized.
- Example Reaction: When H₂O₂ reacts with lead(II) sulfide (PbS) in an acidic medium, it oxidizes sulfur from an oxidation state of -2 in PbS to +6 in lead(II) sulfate (PbSO₄).

3. **Reducing Agent**:
- H₂O₂ can also act as a reducing agent. This means it can donate electrons to other substances, causing those substances to be reduced.
- Example Reaction: When H₂O₂ reacts with lead(IV) oxide (PbO₂), it reduces lead from an oxidation state of +4 in PbO₂ to +2 in lead(II) oxide (PbO).

4. **Bleaching Agent**:
- H₂O₂ is known for its bleaching properties. It can oxidize colored compounds, resulting in the formation of colorless compounds.
- Example: When H₂O₂ is used to bleach hair or fabrics, it oxidizes the colored pigments, leading to a lighter color.

5. **Conclusion**:
- Based on the above properties, H₂O₂ can act as an oxidizing agent, a reducing agent, and a bleaching agent. Therefore, the correct answer to the question is that H₂O₂ can act as all of these.

### Final Answer:
H₂O₂ can act as an oxidizing agent, reducing agent, and bleaching agent. Thus, the correct option is **all of these**.

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