Question

Cu-->Cuo-->Cuso4-->Cu(OH)2

Answer 1

2 Cu + O2 = 2 CuO

CuO + H2SO4 = CuSO4 + H2O

CuSO4 + 2 NaOH = Cu(OH)2 + Na2SO4

Answer 2

2Cu+O2--->2CuO

CuO+SO3--->CuSO4

CuSO4+Ba (OH)2---> Cu(OH)2+Ba SO4