Question

CuO-> Cu->CuCl2->Cu(OH)2->CuSO4

Answer 1

2CuO->2Cu+O2
Cu+2HCl->CuCl2+H2
CuCl2+2NaOH->Cu(OH)2+2NaCl
Cu(OH)2+H2SO4->CuSO4+2H2O