Complete the following reactions:
(i) `C_(6)H_(5)NH_(2)+CHCl_(3)+alc.KOHto`
(ii) `C_(6)H_(5)N_(2)Cl+H_(3)PO_(2)+H_(2)Oto`
(iii) `C_(6)H_(5)NH_(2)+H_(2)SO_(4)(conc.)to`
(iv) `C_(6)H_(5)N_(2)Cl+C_(2)H_(5)OHto`
(v) `C_(6)H_(5)NH_(2)+Br_(2)(aq)to`
(vi) `C_(6)H_(5)NH_(2)+(CH_(3)CO)_(2)Oto`
(vii) `C_(6)H_(5)N_(2)Cloverset((1)HBF_(4))underset((ii)NaNO_(2)//Cu,Delta)rarr`

Explanation

(i) `underset("Aniline")(C_(6)H_(5)NH_(2))+CHCl_(3)+3KOH(alc) underset(("Carbylamine reaction"))overset(Delta)to underset("Phenyl isocyanide (Offensive smell)")(C_(6)H_(5)N overset(to)(=)C)+3KCl +3H_(2)O`
(ii) `underset("Benzenediazonium chloride")(C_(6)H_(5)N_(2)Cl) +H_(3)PO_(2)+H_(2)O underset(("Reduction"))overset(Cu^(+))to underset("Benzene")(C_(6)H_(6))+N_(2)+H_(3)PO_(3)+HCl`
(iii) `underset("Aniline")(C_(6)H_(5)NH_(2))+H_(2)SO_(4)(conc.) to underset("Anilinium hydrogen sulphate")(C_(6)H_(5)overset(+)(N)H_(3)HSO_(4)^(-))`
(iv) `underset("Benzenediazonium chloride")(C_(6)H_(5)N_(2)Cl)+C_(2)H_(5)OH overset("Reduction")to underset("Benzene")(C_(6)H_(6))+underset("Ethanal")(CH_(3)CHO)+N_(2)+HCl`
(v).
(vi) `underset("Aniline")(C_(6)H_(5)NH_(2))+ underset("Acetic anhydride")(CH_(3)CO-O-COCH_(3)) underset("or Pyridine (Acetylation)")overset(CH_(3)COOH)to underset("Acetanilide")(C_(6)H_(5)-NHCOCH_(3))+CH_(3)COOH`
(vii) `underset("Benzenediazonium chloride")(C_(6)H_(5)N_(2)Cl) underset(-HCl)overset(HBF_(4))to underset("Benzenediazonium fluroborate")(C_(6)H_(5)overset(+)(N_(2))BF_(4)^(-)) underset(Delta)overset(NaNO_(2)//Cu,)to underset("Nitrobenzene")(C_(6)H_(5)NO_(2))+BF_(3)+NaF`