Which oxide of nitrogen is not a common pollutant introduced into the atmosphere both due to natural and human activity?

Options

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

Answer

To determine which oxide of nitrogen is not a common pollutant introduced into the atmosphere due to natural and human activity, we will analyze each option provided:

1. **N2O5 (Dinitrogen Pentoxide)**:
- N2O5 is known as nitrogen pentoxide and is a strong oxidizer.
- It is primarily used in the nitration of organic compounds and does not typically enter the atmosphere as a common pollutant.
- Therefore, N2O5 is not considered a common pollutant.

2. **NO2 (Nitrogen Dioxide)**:
- NO2 is a significant pollutant that affects lung function and is associated with respiratory diseases.
- It is also a major contributor to acid rain.
- Hence, NO2 is a common pollutant.

3. **N2O (Nitrous Oxide)**:
- N2O is released from agricultural activities and is known to be a potent greenhouse gas.
- It is approximately 300 times more effective than CO2 in contributing to global warming and also contributes to ozone layer depletion.
- Therefore, N2O is also a common pollutant.

4. **NO (Nitric Oxide)**:
- NO is a colorless and odorless gas that can convert to NO2 in the atmosphere.
- It contributes to respiratory diseases and acid rain.
- Thus, NO is also considered a common pollutant.

After analyzing all options, we conclude that the oxide of nitrogen that is not a common pollutant is **N2O5**.

**Final Answer**: N2O5 (Option 1)