The Method Of Zone Refining Of Metals Is Based On The Principal Of:

The method of zone refining of metals is based on the principle of

The mass of carbon anode consumed (giving only carbon dioxide) in the production of 270 kg of aluminium metal from bauxite by the Hall process is (Atomic mass of Al = 27)

The chief impurity present in red bauxite is

Auto reduction process is used in the extraction of:

 In the extraction of copper from its sulphide are, the metal is formed by reduction of Cu₂O with:

The formula of carnallite is:

The major role of fluorspar (CaF₂) which is added in small quantities in the electrolytic reduction of alumina dissolved in fused cryolite (Na₃AlF₆) is:

 The molten metal, obtained after the element of copper pyrites in the blast furnace, has the composition of:

In metallurgy of iron, when lime stone is added to the blast furnace, the calcium ion ends up in

 In the alumino-thermite process, aluminium acts as