Which one of the following is most basic

Options

A. `Al_(2)O_(3)`
B. MgO
C. `SiO_(2)`
D. `P_(2)O_(5)`

Explanation

To determine which of the given oxides is the most basic, we can analyze each option based on their chemical properties:

1. **Al₂O₃ (Aluminum Oxide)**:
- Aluminum oxide is amphoteric, meaning it can react with both acids and bases. However, it is not strongly basic.

2. **MgO (Magnesium Oxide)**:
- Magnesium oxide is a basic oxide. It reacts with acids to form magnesium salts and with water to form magnesium hydroxide, which is a strong base.

3. **SiO₂ (Silicon Dioxide)**:
- Silicon dioxide is acidic in nature. It does not exhibit basic properties and reacts with bases to form silicates.

4. **P₂O₅ (Phosphorus Pentoxide)**:
- Phosphorus pentoxide is also acidic. It reacts with water to form phosphoric acid and does not exhibit basic characteristics.

Now, comparing the basicity of the oxides:

- Al₂O₃ is amphoteric.
- MgO is basic.
- SiO₂ is acidic.
- P₂O₅ is acidic.

**Conclusion**:
Among the given options, **MgO (Magnesium Oxide)** is the most basic oxide.