Question

What is nitrogen oxide ?


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Answer 1

Explanation:

Nitric oxide (NO) and nitrogen dioxide (NO2) are two gases whose molecules are made of nitrogen and oxygen atoms. These nitrogen oxides contribute to the problem of air pollution, playing roles in the formation of both smog and acid rain. ... Nitric oxide is a colorless, flammable gas with a slight odor.

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Answer 2

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★ NO x  is a generic term for the nitrogen oxides that are most relevant for air pollution, namely nitric oxide (NO) and nitrogen dioxide (NO 2 ).

★ These gases contribute to the formation of smog and acid rain, as well as affecting tropospheric ozone.

★ NO x  gases are usually produced from the reaction among nitrogen and oxygen during combustion of fuels, such as hydrocarbons, in air; especially at high temperatures, such as in car engines.

★ In areas of high motor vehicle traffic, such as in large cities, the nitrogen oxides emitted can be a significant source of air pollution. NO x  gases are also produced naturally by lightning.