The major product formed in the Friedel-Crafts acylation of chlorobenzene is $p-$chloroacetophenone. Identify the correct structure of the major product.

The lower reactivity of the chlorine atom in $CH_2 = CH - Cl$ is due to:

In the reaction shown below,the $o/p$ ratio will be highest when:
$C_6H_5R + HNO_3 \xrightarrow{H_2SO_4} o-\text{nitro-substituted product} + p-\text{nitro-substituted product}$

Identify the two reactions $A(I \rightarrow II)$ and $B(I \rightarrow III)$ respectively in the following set of reactions.

$STATEMENT-1$: Bromobenzene upon reaction with $Br_2 / Fe$ gives $1,4$-dibromobenzene as the major product.
$STATEMENT-2$: In bromobenzene,the inductive effect of the bromo group is more dominant than the mesomeric effect in directing the incoming electrophile.

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