From where does ozone come in the photochemical smog ?

1.	From where does ozone come in the photochemical smog ?
Answer» Sunlight cause photochemical decomposition of `NO_(2)` into `NO` and O `NO_(2) overset(hc)rarrNO+[O]` Atomic oxygen is a highly reactive species. It combines with diatomic oxygen and forms ozone. `O_(2) + O + M rarr O_(3) + M` where, M is inert gas such as nitrogen. This, `O_(3)` is formed during the formation of smog.

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From where does ozone come in the photochemical smog ?

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