Which of the following oxides is amphoteric in nature?

Options

A. `Al_2 O_3`
B. `B_2 O_3`
C. `Tl_2 O_3`
D. `In_2 O_3`

Answer

To determine which of the given oxides is amphoteric in nature, we will analyze the oxides formed by the elements in Group 13 of the periodic table. The elements in this group include Boron (B), Aluminum (Al), Gallium (Ga), Indium (In), and Thallium (Tl).

### Step-by-Step Solution:

1. **Identify the Group 13 Elements**:
The elements in Group 13 are Boron (B), Aluminum (Al), Gallium (Ga), Indium (In), and Thallium (Tl).

2. **Determine the Oxides of Each Element**:
- Boron forms B₂O₃ (Boron trioxide).
- Aluminum forms Al₂O₃ (Aluminum oxide).
- Gallium forms Ga₂O₃ (Gallium oxide).
- Indium forms In₂O₃ (Indium oxide).
- Thallium forms Tl₂O₃ (Thallium oxide).

3. **Analyze the Nature of Each Oxide**:
- **Boron Oxide (B₂O₃)**: This oxide is acidic in nature.
- **Aluminum Oxide (Al₂O₃)**: This oxide is amphoteric, meaning it can react with both acids and bases.
- **Gallium Oxide (Ga₂O₃)**: This oxide is also amphoteric.
- **Indium Oxide (In₂O₃)**: This oxide is generally considered amphoteric.
- **Thallium Oxide (Tl₂O₃)**: This oxide is basic in nature.

4. **Identify the Amphoteric Oxides**:
From the analysis, the amphoteric oxides are Aluminum oxide (Al₂O₃), Gallium oxide (Ga₂O₃), and Indium oxide (In₂O₃).

5. **Select the Correct Answer**:
Since the question asks for which oxide is amphoteric and Aluminum oxide (Al₂O₃) is one of the options provided, it is the correct answer.

### Final Answer:
**Aluminum oxide (Al₂O₃) is amphoteric in nature.**

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