The reaction of an aryl halide with an alkyl halide and sodium metal in dry ether to form substituted aromatic compounds is known as:

The correct order of reactivity for the reaction involving the cleavage of the $C-X$ bond in the following compounds is:

Which of the following groups is an ortho and para directing group?

Identify $A$ and $B$ in the following reaction sequence.

The $C-Cl$ bond in chlorobenzene in comparison to the $C-Cl$ bond in methyl chloride is:

Rank the following compounds in order of decreasing rate of reaction with alkoxide ion $(CH_3CH_2O^{-})$ in a nucleophilic aromatic substitution reaction:
$1$. $1$-bromo-$2$-nitrobenzene
$2$. $1$-bromo-$3$-nitrobenzene
$3$. $1$-bromo-$2,4$-dinitrobenzene
$4$. $1$-bromo-$3,4$-dinitrobenzene