Which of the following is an amphoteric oxide?

Options

A. CaO
B. NaOH
C. BeO
D. LiOh

Answer

To determine which of the given options is an amphoteric oxide, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definition of Amphoteric Oxides**:
Amphoteric oxides are oxides that can react with both acids and bases. This means they can exhibit both acidic and basic properties.

2. **List the Given Options**:
- Option 1: Calcium oxide (CaO)
- Option 2: Sodium hydroxide (NaOH)
- Option 3: Beryllium oxide (BeO)
- Option 4: Lithium oxide (Li2O)

3. **Analyze Each Option**:
- **Calcium Oxide (CaO)**: This is a basic oxide and does not exhibit amphoteric behavior.
- **Sodium Hydroxide (NaOH)**: This is a strong base and does not exhibit amphoteric behavior.
- **Beryllium Oxide (BeO)**: This oxide is known to be amphoteric as it can react with both acids and bases.
- **Lithium Oxide (Li2O)**: This is primarily a basic oxide and does not exhibit amphoteric behavior.

4. **Identify the Amphoteric Oxide**:
From the analysis, the only oxide that can act as both an acid and a base is **Beryllium oxide (BeO)**.

5. **Conclusion**:
Therefore, the answer to the question "Which of the following is an amphoteric oxide?" is **Beryllium oxide (BeO)**.