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Question
How do the oxides of nitrogen enter the atmosphere?
Answer in Brief
Solution
- Oxides of nitrogen, nitric oxide (NO) and nitrogen dioxide (NO2), enter the atmosphere in the following ways:
- On the burning of fuels in furnaces, the temperature increases. At high temperatures, nitrogen and oxygen present in the air combine to form oxides of nitrogen.
- Oxides of nitrogen are produced during the burning of fuel in an internal combustion engine. They enter the atmosphere as exhaust gases.
- During thunderstorms, nitric oxide is formed by the reaction between atmospheric nitrogen and oxygen in the presence of electric discharge.
- Nitric oxide further reacts with atmospheric oxygen and ozone to form nitrogen dioxide.
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Atmospheric Pollution
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