The type of pollution that increases during the day and in the presence of $O_{3}$ is:

Global warming

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Reducing smog

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Acid rain

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Oxidizing smog

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Solution

The correct option is D Oxidizing smog
Hydrocarbons (unburnt fuels) and nitric oxide $(N O)$ are oxidizing smog. With sunlight $N O$ is converted into nitrogen dioxide $(N O_{2})$ .
This $N O_{2}$ in turn absorbs energy from sunlight and breaks up into nitric oxide and free oxygen atom.
$N O_{2} h ν ⟶ N O + [O] . . . . . . . . (i)$
Oxygen atoms are very reactive and combine with the $O_{2}$ in air to produce ozone.
$O + O_{2} \to O_{3} . . . . . . . . (i i)$

The ozone formed in the above reaction $(i i)$ reacts rapidly with the $N O (g)$ formed in the reaction $(i)$ to regenerate $N O_{2}$ .
$N O + O_{3} \to N O_{2} + O_{2}$

$N O_{2}$ and $O_{3}$ are strong oxidising agents and can react with the unburnt hydrocarbons in the polluted air to produce chemicals such as formaldehyde, acrolein and peroxyacetyl nitrate (PAN).
$C H_{4} + O_{2} \to C H_{2} = O formaldehyde + H_{2} O$

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The type of pollution that increases during the day and in the presence of O3 is:

The type of pollution that increases during the day and in the presence of $O_{3}$ is: