Aluminium oxide is not reduced by chemical reactions since

Options

A. Aluminium oxide is reactive
B. Reducing agent cotaminate
C. Aluminium oxide highly stable
D. The process pollutes the environment

Explanation

**Step-by-Step Solution:**

1. **Identify Aluminium Oxide**: Aluminium oxide is represented as \( \text{Al}_2\text{O}_3 \). It consists of aluminium ions (\( \text{Al}^{3+} \)) and oxide ions (\( \text{O}^{2-} \)).

2. **Understand the Nature of Aluminium Oxide**: Aluminium oxide is known for its stability. It forms a protective oxide layer on aluminium metal, which prevents further oxidation.

3. **Evaluate the Options**:
- **Option 1**: Aluminium oxide is reactive. This is incorrect because if it were reactive, it would undergo reduction.
- **Option 2**: Reducing agent is contaminant. This is also incorrect because a reducing agent does not necessarily have to be harmful or a contaminant.
- **Option 3**: Aluminium oxide is highly stable. This is correct as it does not easily undergo reduction or reaction with other substances.
- **Option 4**: This process pollutes the environment. This is irrelevant to the stability of aluminium oxide and does not explain why it is not reduced.

4. **Conclusion**: The correct reason why aluminium oxide is not reduced by chemical reactions is that it is highly stable.

**Final Answer**: Aluminium oxide is not reduced by chemical reactions because it is highly stable.

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