Question

CuO =>CuSO4 => Cu(OH)2 => CuO

Answer 1

CuO =>CuSO4 => Cu(OH)2 => CuO
1)2Cu+O²⇒2CuO
2)CuO+SO3⇒CuSO4
3)CuO+H2O⇒Cu(OH)2
4)Cu(OH)2⇒CuO+H2O