Which of the following is neutral oxide?

Options

A. `H_2 O_2`
B. `Na_2 O`
C. `NO`
D. `PbO`

Explanation

To determine which of the following is a neutral oxide, we need to analyze the properties of each oxide mentioned in the question.

### Step-by-Step Solution:

1. **Identify the Oxides**: The oxides we are considering are H2O2 (hydrogen peroxide), Na2O (sodium oxide), NO (nitric oxide), and PbO (lead(II) oxide).

2. **Analyze H2O2**:
- The pH value of H2O2 is around 6.2.
- Since the pH is less than 7, H2O2 is acidic in nature.

3. **Analyze Na2O**:
- The pH value of Na2O is around 14.
- A pH greater than 7 indicates that Na2O is basic in nature.

4. **Analyze NO**:
- NO does not react with litmus paper and results in a colorless solution.
- This indicates that NO does not exhibit acidic or basic properties, making it neutral.

5. **Analyze PbO**:
- PbO is classified as amphoteric, meaning it can react with both acids and bases.
- Therefore, PbO is not neutral.

6. **Conclusion**:
- Among the oxides analyzed, the only one that is neutral is NO (nitric oxide).

### Final Answer:
The neutral oxide among the given options is **NO**.

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