Name the metal that is purified by placing the impure metal on sloping hearth of a reverberatory furnance and heating that above its melting point in the absence of air .

Options

A. Mercury
B. Galium
C. Zirconium
D. Copper

Answer

A

Explanation

Some metals have very low melting point vaporize on heating, while the associated impurities remain in the solid state. Mercury can be purified by this method.