Suggest a condition unders which magnesium could reduce alumina.

Explanation

To determine the conditions under which magnesium can reduce alumina (Al2O3), we can follow these steps:

### Step 1: Understanding the Reaction
Alumina (Al2O3) is a compound of aluminum and oxygen. To reduce alumina, we need a reducing agent that can donate electrons to aluminum ions in the alumina. In this case, magnesium (Mg) can serve as a reducing agent.

### Step 2: Writing the Reaction
The reduction reaction can be represented as:
\[ \text{Al}_2\text{O}_3 + 3\text{Mg} \rightarrow 2\text{Al} + 3\text{MgO} \]
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