Which of the following compound does not react with cold and dil. `HNO_(3)`?

Options

A. PbO
B. `PbO_(2)`
C. `FeSO_(4)`
D. `PbCl_(2)`

Explanation

To determine which compound does not react with cold and dilute HNO3, we will analyze each option one by one.

### Step-by-Step Solution:

1. **Identify the Compounds**: The compounds given are:
- Option 1: PbO (Lead(II) oxide)
- Option 2: PbO2 (Lead(IV) oxide)
- Option 3: FeSO4 (Iron(II) sulfate)
- Option 4: PbCl2 (Lead(II) chloride)

2. **Check Reaction of PbO with HNO3**:
- When PbO reacts with cold and dilute HNO3, it forms lead(II) nitrate (Pb(NO3)2).
- **Reaction**: PbO + 2 HNO3 → Pb(NO3)2 + H2O
- Conclusion: PbO reacts with HNO3.

3. **Check Reaction of PbO2 with HNO3**:
- PbO2 does not react with cold and dilute HNO3. This is because PbO2 is more acidic and does not undergo a reaction under these conditions.
- Conclusion: PbO2 does not react with HNO3.

4. **Check Reaction of FeSO4 with HNO3**:
- When FeSO4 reacts with HNO3, it forms iron(III) nitrate (Fe(NO3)3), nitrogen monoxide (NO), and water.
- **Reaction**: 3 FeSO4 + 8 HNO3 → 3 Fe(NO3)3 + 2 NO + 4 H2O
- Conclusion: FeSO4 reacts with HNO3.

5. **Check Reaction of PbCl2 with HNO3**:
- PbCl2 reacts with HNO3 to form lead(II) nitrate (Pb(NO3)2) and hydrochloric acid (HCl).
- **Reaction**: PbCl2 + 4 HNO3 → Pb(NO3)2 + 2 HCl
- Conclusion: PbCl2 reacts with HNO3.

6. **Final Conclusion**:
- Among the four compounds, PbO, FeSO4, and PbCl2 all react with cold and dilute HNO3.
- The only compound that does not react with cold and dilute HNO3 is **PbO2**.

### Answer:
**PbO2 does not react with cold and dilute HNO3.**