what chemical process is used for obtaining a metal from its oxide

The chemical process used for obtaining a metal from its oxide is reduction. In this process, the metal oxide is reduced using reducing agents such as carbon, coke, sodium, aluminum, or calcium. The reducing agent reacts with the metal oxide to form the metal and carbon dioxide or other byproducts. For example, zinc oxide can be reduced to metallic zinc by heating it with carbon. The reduction reaction chosen depends on the chemical reactivity of the metal.