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

1. N2O5
2. NO2
3. NO
4. N2O

Correct answer: N2O5

Solution

N2O5 is not commonly found as a pollutant in the atmosphere because it is highly reactive and unstable under normal atmospheric conditions, unlike NO, NO2, and N2O, which are more stable and commonly released from natural and anthropogenic sources.

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