(i) `underset("Iodoethane")(CH_(3)CH_(2)I)overset(NaCN)tounderset((A))underset("Propanenitrile")(CH_(3)CH_(2)CN)underset("Partial hydrolysis")overset(OH^(-))to`
`{:(CH_(3)-CH_(2)-overset(O)overset(||)C-NH_(2)overset(NaOH+Br_(2))toCH_(3)CH_(2)NH_(2)),(" ""Propanamide" " ""Ethanamine"),(" "(B) " "(C)):}`
(ii) `underset("Benzenediazonium chloride")(C_(6)H_(5)N_(2)Cl)overset(CuCN)tounderset((A))underset("Cyanobenzene")(C_(6)H_(5)CN)`
`overset(H_(2)"O"//H^(+))tounderset((B))underset("Benzoic acid")(C_(6)H_(5)COON)overset(NH_(3))to[C_(6)H_(5)COONH_(4)]`
`overset(Delta)tounderset((C))underset("Benzamide")(C_(6)H_(5)CONH_(2))`
(iii) `underset("Bromoethane")(CH_(3)CH_(2)Br)overset(KCN)tounderset((A))underset("Propanenitrile")(CH_(3)CH_(2)CN)`
`overset(LiAlH_(4))tounderset((B))underset("Propane-1-amine")(CH_(3)CH_(2)CH_(2)NH_(2))underset(O^(@)C)overset(HNO_(2))to`
`"["CH_(3)CH_(2)CH_(2)overset(+)N-=NCl^(-)"]"overset(H_(2)O)tounderset((C))underset("Propan-1-ol")(CH_(3)CH_(2)CH_(2)OH)`
(iv)`underset("Nitrobenzene")(C_(6)H_(5)NO_(2))overset(Fe//HCl)tounderset((A))underset("Aniline")(C_(6)H_(5)NH_(2))`
`underset(273K)overset(NaNO_(2)+HCl)tounderset("Benzenediazonium chloride(B)")(C_(6)H_(5)overset(+)N-=NCl^(-))overset(H_(2)"O"//H^(+))underset(Delta)tounderset("Phenol(C)")(CH_(6)H_(5)OH)`
(v) `underset("Ethanoic acid")(CH_(3)COOH)underset(Delta)overset(NH_(3))tounderset((A))underset("Ethanamide")(CH_(3)CONH_(2))`
`underset(("Hofmann bromamide reaction"))overset(NaOBr)tounderset((B))underset("Methanamine")(CH_(3)NH_(2))overset(NaNO_(2)//HCl)tounderset((C))underset("Methanol")(CH_(3)OH)`
(vi)
