Question

CuO->Cu->CuCI2->Cu(OH)2->CuSO4

Answer 1

CuO+H2=Cu+H2O
Cu+CL2=CuCl2
CuCl2+2NaOH=Cu(OH)2+2NaCl
Cu(OH)2+H2SO4(конц)=CuSO4+2H2O