Answer:
N₂(g) + 2O₂(g) → 2NO₂(g).
Explanation;
Photo-chemical smog is considered to be a new type of air pollution that is basically a mixture of pollutants that are formed when volatile compounds of organic nature (Hydrocarbons) react and Nitrogen oxides (NOx) react with solar radiations of sun and lead to the formation of photochemical smog that looks like a brown haze in the skies of cities.
pounds (VOCs) react to sunlight, creating a brown haze above cities. It tends to occur more often in summer, because that is when we have the most sunlight.
As mentioned in the question, the formation of smog involves a series of reactions:
N2(g) + O2(g)—>2NO(g)
2NO(g) + O2(g)—>2NO2(g)
NON(g) light_» NO(g) + O(g)
O2(g)+O(g)—>Os(9)
NO(g) + O2(g)—>NO2(g) + O2(g)
If we combine all these chemical equations, it gives an answer as:
N₂(g) + 2O₂(g) → 2NO₂(g).
This is because main components involve in the formation of smog is initial N2 and 2 molecules of O2.
Hope it helps!