Identify the name of the reaction in which an aryl halide reacts with an alkyl halide and sodium metal in the presence of dry ether to yield substituted aromatic compounds.

Which of the following is the least reactive in the case of bromination?

The decreasing order of reactivity of the given compounds towards nucleophilic substitution with aqueous $NaOH$ is:
$(I)$ $1$-bromo-$3$-nitrobenzene
$(II)$ $1$-bromo-$2,4,6$-trinitrobenzene
$(III)$ $1$-bromo-$4$-nitrobenzene
$(IV)$ $1$-bromo-$2,4$-dinitrobenzene

In nucleophilic substitution reactions,alkyl halides are more reactive than aryl halides because...

$CH \equiv CH$ $\xrightarrow{\text{Red Hot Fe tube}} A$ $\xrightarrow[\text{Dark}]{Cl_2 / FeCl_3} B$ $\xrightarrow[\text{Anhy. } AlCl_3]{CH_3 - Cl} C$ (Major)
Product '$C$' is

Assertion : The presence of nitro group facilitates nucleophilic substitution reactions in aryl halides.
Reason : The intermediate carbanion is stabilized due to the presence of nitro group.