The product of the given reaction is:

The function of anhydrous $AlCl_3$ in the Friedel-Crafts reaction is to ........ .

Acetanilide $\xrightarrow[{CH_3COOH}]{{Br_2}}$ major product will be

The compound which will have the lowest rate towards nucleophilic aromatic substitution on treatment with $OH^-$ is

Which of the following reasons support that aryl halides are less reactive than alkyl halides towards nucleophilic substitution reactions?
$a)$ The formation of more stable arenium ion
$b)$ Partial double bond character of $C-X$ bond
$c)$ Longer $C-X$ bond
$d)$ $sp^2$ carbon bonded to $X$ is more electronegative

"The presence of an electron-withdrawing group $\left( -NO_2 \right)$ at the ortho and para positions in haloarenes increases the reactivity of haloarenes towards nucleophilic substitution reactions." Prove this with an example.