Corumdum is

Options

A. `SrO_(2)`
B. `Al_(2)O_(3)`
C. `CaCl_(2)`
D. `Cu_(2)Cl_(2)`

Explanation

**Step-by-Step Solution:**

1. **Identify Corundum**:
- Corundum is a naturally occurring mineral that is found in the Earth's crust.

2. **Determine the Composition**:
- The chemical formula for corundum is Al₂O₃, which indicates that it is composed of aluminum and oxygen.

3. **Identify the Metal**:
- Since corundum contains aluminum (Al), it is classified as an ore of aluminum.

4. **Conclude the Answer**:
- Therefore, corundum is an ore of aluminum with the formula Al₂O₃.

5. **Select the Correct Option**:
- Based on the information, the correct answer is option B, which states that corundum is an ore of aluminum.

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