Write the chemical reactions formation of oxides of nitrogen? Mention its sources?

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1. N2(g )+ O2(g) ‐‐‐‐‐‐ >2NO(g)

2. 2NO(g) + O2(g) ‐‐‐‐‐‐ ‐‐‐‐‐‐ > 2NO2(g)

3. NO(g)+O3(g) ‐‐‐‐‐‐ > NO2(g) + O2(g)

Sources: 1. At high attitude when lightning strokes, dinitrogen and dioxygen combine to form oxides of nitrogen.

2. Burning of fossil fuels in an automobile engine at high temperature, dinitrogen and dioxygen combine to yield significant quantities of nitric oxide and nitrogen dioxide.

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