Complete the following reactions:
(i) C6H5NH2+CHCl3+alc.KOH→
(ii) C6H5N2Cl3+H3PO2+H2O→
(iii) C6H5NH2+H2SO4(conc.)→
(iv) C6H5N2Cl+C2H5OH→
(v) C6H5NH2+Br2(aq)→
(vi) C6H5NH2+(CH3CO)2→
(vii) C6H5N2Cl(i)HBF4−−−−−−−−−−−→(ii)NaNO2/Cu,Δ