Name a metal other than aluminium that is covered with a layer of oxide film.

Name the oxide ore of aluminium.

Name two metals other than aluminum which are obtained by electrolytic reduction.

________ does not react with aluminium due to its layer of oxide on it.

Metal protected by a layer of its own oxide is

A frame made of a metallic wire enclosing a surface area A is covered with a soap film . If the area of the frame of metallic wire will be changed by

Give some examples for metals other than beryllium and aluminium that becomes passive on. treatment with concentrated nitric acid.