(N/A) $(i)$ Nitrobenzene $\xrightarrow{Sn/HCl}$ Aniline $\xrightarrow{NaNO_2/HCl, 0-5^{\circ}C}$ Benzenediazonium chloride $\xrightarrow{CuCN}$ Benzonitrile $\xrightarrow{H_3O^+}$ Benzoic acid.
$(ii)$ Benzene $\xrightarrow{HNO_3/H_2SO_4}$ Nitrobenzene $\xrightarrow{Br_2/FeBr_3}$ $m-$Bromonitrobenzene $\xrightarrow{Sn/HCl}$ $m-$Bromoaniline $\xrightarrow{NaNO_2/HCl, 0-5^{\circ}C}$ $m-$Bromobenzenediazonium chloride $\xrightarrow{H_2O, \Delta}$ $m-$Bromophenol.
$(iii)$ Benzoic acid $\xrightarrow{NH_3, \Delta}$ Benzamide $\xrightarrow{Br_2/KOH}$ Aniline.
$(iv)$ Aniline $\xrightarrow{Br_2/H_2O}$ $2,4,6-$Tribromoaniline $\xrightarrow{NaNO_2/HCl, 0-5^{\circ}C}$ $2,4,6-$Tribromobenzenediazonium chloride $\xrightarrow{HBF_4, \Delta}$ $2,4,6-$Tribromofluorobenzene.
$(v)$ Benzyl chloride $\xrightarrow{KCN}$ Phenylacetonitrile $\xrightarrow{LiAlH_4}$ $2-$Phenylethanamine.
$(vi)$ Chlorobenzene $\xrightarrow{HNO_3/H_2SO_4}$ $p-$Nitrochlorobenzene $\xrightarrow{Sn/HCl}$ $p-$Chloroaniline.
$(vii)$ Aniline $\xrightarrow{(CH_3CO)_2O/Pyridine}$ Acetanilide $\xrightarrow{Br_2/CH_3COOH}$ $p-$Bromoacetanilide $\xrightarrow{H_3O^+}$ $p-$Bromoaniline.
$(viii)$ Benzamide $\xrightarrow{LiAlH_4}$ Benzylamine $\xrightarrow{NaNO_2/HCl}$ Benzyl alcohol $\xrightarrow{PCl_5}$ Benzyl chloride $\xrightarrow{Mg/ether, then H_2O}$ Toluene.
$(ix)$ Aniline $\xrightarrow{NaNO_2/HCl, 0-5^{\circ}C}$ Benzenediazonium chloride $\xrightarrow{CuCN}$ Benzonitrile $\xrightarrow{LiAlH_4}$ Benzylamine $\xrightarrow{HNO_2}$ Benzyl alcohol.