MgCl->Mg->MgOH->Cu(OH)2->CuO->Cu

Question

MgCl->Mg->MgOH->Cu(OH)2->CuO->Cu

Answer 1

MgCl₂ + H= Mg + HCl 
Mg + 2KOH= Mg(OH)₂ + 2K
Mg(OH)₂ + Cu= Cu(OH)₂ + Mg
 CuO + H₂= Cu + H₂O