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) `C_(6)H_(5)NH_(2) + CHCl_(3) + 3KOH to underset("Phenyl isocyanide")(C_(6)H_(5)NC) + 3KCl + 3H_(2)O`
(ii) `C_(6)H_(5)N_(2)Cl + H_(3)PO_(2) + H_(2)O to underset("Benzene")(C_(6)H_(6)) + N_(2) + H_(3)PO_(3) + HCl`
(iii) `C_(6)H_(5)NH_(2) + H_(2)SO_(4)("conc.") to underset("Anilinium hydrogensulphate")overset(+)(C_(6)H_(6)NH_(3)HSO_(4)^(-))`
(iv) `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`

(vi) `C_(6)H_(5)NH_(2) + (CH_(3)CO)_(2)O overset(CH_(3)COOH)(to) underset("Acetanilide")(C_(6)H_(5)CONHCH_(3)) + CH_(3)COOH`
(vii) `C_(6)H_(5)N_(2)Cl overset((i)HBF_(4))(to) C_(6)H_(5)N_(2)^(+)BF_(4)^(-) underset(Delta)overset((ii)NaNO_(2),Cu)(to) underset("Nitrobenzene")(C_(6)H_(5)NO_(2)) + BF_(3) + NaF`