HCl is added to the following oxides, which one would give `H_(2)O_(2)`?

Options

A. `BaO_(2)`
B. `MnO_(2)`
C. `PbO_(2)`
D. `NO_(2)`

Answer

To determine which oxide reacts with hydrochloric acid (HCl) to produce hydrogen peroxide (H2O2), we will analyze each oxide provided in the question: barium oxide (BaO2), manganese oxide (MnO2), lead oxide (PbO2), and nitrogen dioxide (NO2).

### Step-by-Step Solution:

1. **Identify the Oxides**: The oxides given are:
- A) Barium oxide (BaO2)
- B) Manganese oxide (MnO2)
- C) Lead oxide (PbO2)
- D) Nitrogen dioxide (NO2)

2. **Analyze Barium Oxide (BaO2)**:
- When HCl is added to BaO2, it reacts to form barium chloride (BaCl2), water (H2O), and hydrogen peroxide (H2O2).
- The reaction can be summarized as:
\[ \text{BaO}_2 + 2 \text{HCl} \rightarrow \text{BaCl}_2 + \text{H}_2\text{O}_2 + \text{H}_2\text{O} \]
- **Conclusion**: BaO2 produces H2O2 when reacted with HCl.

3. **Analyze Manganese Oxide (MnO2)**:
- When HCl is added to MnO2, it forms manganese chloride (MnCl2), chlorine gas (Cl2), and water (H2O).
- The reaction can be summarized as:
\[ \text{MnO}_2 + 4 \text{HCl} \rightarrow \text{MnCl}_2 + 2 \text{Cl}_2 + 2 \text{H}_2\text{O} \]
- **Conclusion**: MnO2 does not produce H2O2.

4. **Analyze Lead Oxide (PbO2)**:
- When HCl is added to PbO2, it forms lead chloride (PbCl2), chlorine gas (Cl2), and water (H2O).
- The reaction can be summarized as:
\[ \text{PbO}_2 + 4 \text{HCl} \rightarrow \text{PbCl}_2 + 2 \text{Cl}_2 + 2 \text{H}_2\text{O} \]
- **Conclusion**: PbO2 does not produce H2O2.

5. **Analyze Nitrogen Dioxide (NO2)**:
- When HCl is added to NO2, it forms nitrosyl chloride (NOCl), chlorine gas (Cl2), and water (H2O).
- The reaction can be summarized as:
\[ 2 \text{NO}_2 + 4 \text{HCl} \rightarrow 2 \text{NOCl} + 2 \text{Cl}_2 + 2 \text{H}_2\text{O} \]
- **Conclusion**: NO2 does not produce H2O2.

### Final Answer:
After analyzing all the options, the only oxide that produces hydrogen peroxide (H2O2) when reacted with hydrochloric acid (HCl) is **A) Barium oxide (BaO2)**.