Question:
Write down the reactions involved during the formation of photochemical smog.
Answer:
Photochemical smog is produce under the sunlight between oxides of nitrogen and hydrocarbons
NO oxidised by oxygen of NO2
N2 + O2 → 2NO (high temperature)
2NO + O2 → 2NO2 (high temperature)
NO2 further dissociates into NO and O under sunlight
NO2 → NO + O
This free oxygen reacts together and form Ozone
O2 + O → O3
Further, Ozone reacts with NO to form NO2 which creates photochemical smog
NO + O2 → NO2 + O2
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