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JEE Main levelSingle correct optionDifficulty 2 of 3ev070

Which pair consists of chlorine reservoir species that temporarily hold chlorine in an unreactive form?

A $Cl$ and $ClO$
B $CF X_{2} Cl X_{2}$ and $CFCl X_{3}$
C $Cl X_{2}$ and $HOCl$
D $HCl$ and $ClONO X_{2}$

Answer: D

Cl atoms react with methane to give

HCl

, and

ClO

combines with

NO X_{2}

to give

ClONO X_{2}

. Both are relatively inert towards ozone. Cl and ClO are the active species, and the CFCs are source gases.

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