Write True/False :
`Al_2O_3` is an amphoteric oxide.

Answer

To determine whether the statement "Al₂O₃ is an amphoteric oxide" is true or false, we can follow these steps:

### Step 1: Define Amphoteric Oxides
An amphoteric oxide is a type of oxide that can react with both acids and bases. This means that it can act as a base when reacting with an acid and as an acid when reacting with a base.

**Hint:** Remember that amphoteric oxides can neutralize both acids and bases.

### Step 2: Examine the Behavior of Al₂O₃ with Acids
When aluminum oxide (Al₂O₃) reacts with an acid, such as hydrochloric acid (HCl), it behaves as a base. The reaction can be represented as follows:
\[ \text{Al}_2\text{O}_3 + 6 \text{HCl} \rightarrow 2 \text{AlCl}_3 + 3 \text{H}_2\text{O} \]
In this reaction, aluminum oxide reacts with hydrochloric acid to form aluminum chloride (a salt) and water.

**Hint:** Look for the products of the reaction to identify if it behaves as a base.

### Step 3: Examine the Behavior of Al₂O₃ with Bases
When aluminum oxide reacts with a strong base, such as sodium hydroxide (NaOH), it behaves as an acid. The reaction can be represented as follows:
\[ \text{Al}_2\text{O}_3 + 2 \text{NaOH} + 3 \text{H}_2\text{O} \rightarrow 2 \text{NaAl(OH)}_4 \]
In this case, aluminum oxide reacts with sodium hydroxide to form sodium aluminate and water.

**Hint:** Check how it reacts with a base to confirm its acidic behavior.

### Step 4: Conclusion
Since aluminum oxide (Al₂O₃) can react with both acids and bases, acting as a base with acids and as an acid with bases, it qualifies as an amphoteric oxide. Therefore, the statement "Al₂O₃ is an amphoteric oxide" is **True**.

**Final Answer:** True