What role is played by `CO_(2)` in getting pure alumina `(Al_(2)O_(3))` in the extraction of aluminium ?

Explanation

To understand the role of CO₂ in the extraction of pure alumina (Al₂O₃) from bauxite ore, we can break down the process step by step:

### Step-by-Step Solution:

1. **Bauxite Ore Processing**:
- Bauxite ore, which primarily contains aluminum oxide (Al₂O₃), is mixed with sodium carbonate (Na₂CO₃) and heated. This process is known as fusion.
- The reaction can be represented as:
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