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`
