Which of the following is an $o-/p-$ directing group?

Identify the major product formed in the following reaction.
$Chlorobenzene \xrightarrow{Cl_2, \text{ Anhydrous } FeCl_3} \text{Product}$

The increasing order of nitration of the following compounds is:
$(A)$ Aniline
$(B)$ Chlorobenzene
$(C)$ Anisole
$(D)$ Toluene

$C_6H_6$ $\xrightarrow[\text{Conc. } H_2SO_4]{\text{Conc. } HNO_3} B$ $\xrightarrow{\text{Sn + HCl}} C$ $\xrightarrow[0-5^\circ C]{HNO_2} D$ $\xrightarrow{HBF_4} E$ $\xrightarrow{\Delta} F$
$F$ will be

The reaction of an aryl halide with sodium metal in the presence of dry ether to form a biphenyl is known as:

The compound that reacts the fastest with sodium methoxide is