Diamagnetic gas neutral towards water is:

Options

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

Explanation

To solve the question "Diamagnetic gas neutral towards water is:", we will analyze the given options one by one to determine which gas is diamagnetic and neutral towards water.

### Step-by-Step Solution:

1. **Identify the Gases**: The gases provided are:
- N2O (Nitrous Oxide)
- NO2 (Nitrogen Dioxide)
- NO (Nitrogen Monoxide)
- N2O3 (Dinitrogen Trioxide)

2. **Analyze N2O (Nitrous Oxide)**:
- **Electrons**: N2O has an even number of electrons, which makes it diamagnetic.
- **Reactivity with Water**: N2O is neutral towards water, meaning it does not react with water.
- **Conclusion**: N2O is diamagnetic and neutral towards water.

3. **Analyze NO2 (Nitrogen Dioxide)**:
- **Electrons**: NO2 has an odd number of electrons, making it paramagnetic.
- **Reactivity with Water**: NO2 is acidic in nature and reacts with water.
- **Conclusion**: NO2 is not diamagnetic and is not neutral towards water.

4. **Analyze NO (Nitrogen Monoxide)**:
- **Electrons**: NO has an odd number of electrons, which makes it paramagnetic.
- **Reactivity with Water**: NO is neutral towards water.
- **Conclusion**: NO is not diamagnetic, so it does not fit the criteria.

5. **Analyze N2O3 (Dinitrogen Trioxide)**:
- **Electrons**: N2O3 has an even number of electrons, making it diamagnetic.
- **Reactivity with Water**: N2O3 is acidic and reacts with water.
- **Conclusion**: N2O3 is diamagnetic but not neutral towards water.

6. **Final Conclusion**:
- The only gas that is both diamagnetic and neutral towards water is N2O (Nitrous Oxide).

### Answer:
The diamagnetic gas that is neutral towards water is **N2O (Nitrous Oxide)**.

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