Name an oxide that liberates chlorine with HCI and oxygen with conc. `H_(2)SO_(4)`.

Explanation

To solve the question of identifying an oxide that liberates chlorine gas with hydrochloric acid (HCl) and oxygen gas with concentrated sulfuric acid (H₂SO₄), we can follow these steps:

### Step 1: Identify the oxide
We need to find an oxide that can react with both HCl and concentrated H₂SO₄ to release the specified gases.

**Hint:** Think about common metal oxides that have oxidizing properties.

### Step 2: Consider manganese dioxide (MnO₂)
Manganese dioxide (MnO₂) is a well-known oxide that has oxidizing properties.

**Hint:** Recall that transition metal oxides often exhibit such properties.

### Step 3: Reaction with HCl
When MnO₂ reacts with HCl, it undergoes a redox reaction. The balanced chemical equation for this reaction is:

\[ \text{MnO}_2 + 4 \text{HCl} \rightarrow \text{MnCl}_2 + \text{Cl}_2 + 2 \text{H}_2\text{O} \]

From this reaction, we can see that chlorine gas (Cl₂) is liberated.

**Hint:** Look for the products of the reaction to confirm the gas evolved.

### Step 4: Reaction with concentrated H₂SO₄
Next, we consider the reaction of MnO₂ with concentrated sulfuric acid. The balanced equation for this reaction is:

\[ 2 \text{MnO}_2 + 2 \text{H}_2\text{SO}_4 \rightarrow 2 \text{MnSO}_4 + \text{O}_2 + 2 \text{H}_2\text{O} \]

In this case, oxygen gas (O₂) is liberated.

**Hint:** Again, check the products to ensure that the correct gas is produced.

### Step 5: Conclusion
Based on the reactions, we conclude that the oxide that liberates chlorine with HCl and oxygen with concentrated H₂SO₄ is manganese dioxide (MnO₂).

**Final Answer:** The oxide is MnO₂ (manganese dioxide).