Name two metals which are obtained by reducing thier oxides by heating with aluminium

How is the metal oxides present in calcined/roasted ore reduced to the metal

Two metals that can be obtained by reducing their oxides using aluminium are chromium and manganese.

The reduction of metal oxides to obtain the corresponding metals can be achieved by a process called thermite reaction. In this process, powdered aluminium reacts with metal oxides in a highly exothermic reaction, which releases a large amount of heat. The heat generated is used to reduce the metal oxides and obtain the metals.

To perform the reduction, the metal oxide is mixed with powdered aluminium. The reaction is initiated by heating the mixture. The aluminium reacts with the oxygen present in the metal oxide, producing aluminium oxide and releasing heat. The heat is sufficient to drive the reduction reaction, causing the metal oxide to be reduced to its pure metal form. The aluminium oxide, being produced as a byproduct, is a stable compound and can be easily separated from the desired metal.

The thermite reaction is often used to obtain metals that have a high affinity for oxygen, such as chromium and manganese, as it provides a highly efficient method of reducing metal oxides to their pure metal form.