Metals form basic oxides or amphoteric oxides.

Answer

To determine whether the statement "Metals form basic oxides or amphoteric oxides" is true or not, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Types of Metal Oxides**:
- Metals can form different types of oxides. The two main categories we are focusing on are basic oxides and amphoteric oxides.

2. **Understand Basic Oxides**:
- Basic oxides are those that react with water to form alkaline solutions (bases).
- Examples of basic oxides include:
- Sodium oxide (Na2O) → Reacts with water to form sodium hydroxide (NaOH).
- Magnesium oxide (MgO) → Reacts with hot water to form magnesium hydroxide (Mg(OH)2).
- Potassium oxide (K2O) and Calcium oxide (CaO) also form bases when reacted with water.

3. **Understand Amphoteric Oxides**:
- Amphoteric oxides are those that can react with both acids and bases to produce salt and water.
- An example of an amphoteric oxide is aluminum oxide (Al2O3), which reacts with both hydrochloric acid (HCl) and sodium hydroxide (NaOH).

4. **Evaluate the Statement**:
- The statement claims that metals form either basic oxides or amphoteric oxides.
- From our examples, we see that metals do indeed form basic oxides (like Na2O, MgO) and amphoteric oxides (like Al2O3).

5. **Conclusion**:
- Since we have verified that metals can form both basic and amphoteric oxides, the statement is true.

### Final Answer:
The statement "Metals form basic oxides or amphoteric oxides" is correct.

---