Which of the following oxides does not form acidic aqueous solution ?

Options

A. `N_(2)O_(3)`
B. `NO_(2)`
C. `N_(2)O_(5)`
D. `NO `

Explanation

To determine which of the following oxides does not form an acidic aqueous solution, we will analyze each oxide provided in the options. The key is to identify whether the oxide reacts with water to produce an acidic solution.

### Step-by-Step Solution:

1. **Identify the Oxides**:
We have several nitrogen oxides to consider. The options typically include:
- N2O3 (Dinitrogen trioxide)
- NO2 (Nitrogen dioxide)
- N2O5 (Dinitrogen pentoxide)
- NO (Nitric oxide)

2. **Analyze N2O3**:
- When N2O3 reacts with water, it forms HNO2 (Nitrous acid).
- Since HNO2 is an acid, N2O3 is classified as an acidic oxide.

3. **Analyze NO2**:
- NO2 can dimerize to form N2O4, but when it reacts with water, it forms HNO3 (Nitric acid).
- Since HNO3 is also an acid, NO2 is classified as an acidic oxide.

4. **Analyze N2O5**:
- N2O5 reacts with water to produce HNO3 (Nitric acid).
- As HNO3 is an acid, N2O5 is also classified as an acidic oxide.

5. **Analyze NO**:
- NO (Nitric oxide) does not react with water to form any oxoacid.
- Therefore, it does not produce an acidic solution when dissolved in water, making it a neutral oxide.

6. **Conclusion**:
- Among the given options, NO is the only oxide that does not form an acidic aqueous solution.

### Final Answer:
The oxide that does not form an acidic aqueous solution is **NO (Nitric oxide)**.

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