State whether the following statement is true or false:
At ordinary temperature,the surfaces of metals such as magnesium,aluminium,zinc,lead,etc.,are covered with a thin layer of oxide which prevents the metal from further oxidation.

(TRUE) The statement is True.
When metals like magnesium $(Mg)$,aluminium $(Al)$,zinc $(Zn)$,and lead $(Pb)$ are exposed to air at ordinary temperatures,they react with atmospheric oxygen to form a thin,protective layer of their respective metal oxides on their surface.
This oxide layer is non-porous and adheres strongly to the metal surface,acting as a barrier that prevents further oxidation or corrosion of the underlying metal.