The secondary precursors of photochemical smo | vedclass

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(D) Photochemical smog is formed in warm and dry climates due to the action of sunlight on nitrogen oxides and hydrocarbons. $NO_2$ and $O_3$ are stro

Vedclass · Accepted Answer

$O_3$ and $PAN$

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(D) Photochemical smog is formed in warm and dry climates due to the action of sunlight on nitrogen oxides and hydrocarbons. $NO_2$ and $O_3$ are strong oxidizing agents. They react with unburnt hydrocarbons in the atmosphere to produce secondary pollutants such as formaldehyde,acrolein,and $PAN$ (peroxyacetyl nitrate). Therefore,$O_3$ and $PAN$ are considered the secondary pollutants or secondary precursors formed during the process.

List-$I$	List-$II$
$A$. Bleaching of paper	$I$. $CF_2Cl_2$
$B$. Eye irritant	$II$. $H_2O_2$
$C$. Freons	$III$. $Na_2AsO_3$
$D$. Herbicide	$IV$. $PAN$
	$V$. $CO_2$

The secondary precursors of photochemical smog are

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Match the items in List-$I$ with the items in List-$II$ and select the correct answer from the given options:
List-$I$ List-$II$
$A$. Bleaching of paper $I$. $CF_2Cl_2$
$B$. Eye irritant $II$. $H_2O_2$
$C$. Freons $III$. $Na_2AsO_3$
$D$. Herbicide $IV$. $PAN$
$V$. $CO_2$

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