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Q.
The chemical formula of 'tear gas" is
The p-Block Elements
Solution:
"Tear gas" is the name given to the compound, $CCl_3NO_2$. It is also called chloropicrin.
$CHCl_3 \xrightarrow{HNO_3} CCl_3NO_2 $
or $CH_3NO_2 \xrightarrow[NaOH]{Cl_2} CCl_3NO_2$