Metals are required for a variety of purposes. For this we need their extraction from their ores. Ores mined from the earth are usually contaminated with many impurities which must be removed prior to the extraction of metals. The extraction of pure metal involves the following steps:
(1)Concentration of Ore
(2) Extraction of the metal from the concentrated ore
(3) Refining of the metal
(d)We cannot use carbon to obtain sodium from sodium oxide.why?State the reactions taking place at cathode and anode during electrolytic reduction of sodium chloride.