The figure illustrates three regions of the reactivity series, relative to the positions of hydrogen and carbon. Each of the following descriptions applies to a metal. For each, assign the metal to a region (A, B or C).
This metal is reduced from its ore by hydrogen rather than carbon because it produces a purer product.
This metal is extracted from its ore by electrolysis of the molten salt.
This metal is found in nature in its elemental state.
This metal is roasted with coke and calcium carbonate flux to produce molten metal.