The brown haze of photochemical smog is largely attributable to :

Options

A. NO
B. `NO_2`
C. `CH_3overset(O)overset(||)COONO_2`
D. `CH_2=CHCH-O`

Answer

B

Explanation

Photochemical smog is initiated by the photochemical dissociation of `NO_2` that result in the formation of NO. This NO rapidly reacts with `O_3` to give `NO_3` (brown ) responsible for causing haze if its concentration is very high.
`NO_(a(g))overset(hupsilon)rarrNO_((g))+undersetunderset(("Very reuctive"))("nascent oxygen")[O]`
`[O]+O_2hArrO_2`[reacts rapidly with NO]
`O_2 +NOrarrundersetunderset("[In high ,conc, from haze]")("Brown gas")(NO_2+O_2)`