(a) Name the role of `Na_(3)AlF_(6)` in the electrolytic reduction of alumina.
(b) How does the FeO impurity present in sulphide ore of copper is removed ?

The IUPAC name of Na_(3)[AlF_(6)] is………

The function of fluorspar in the electrolytic reduction of alumnia dissolved in fused cryotile (Na_(3)AlF_(6)) is:

Extraction of metal fron the ore cassiterlate involves (i) carbon reduction of an oxide are self reduction of a sulphide or (iii) removal of copper imputiry (iv) removel of iron inpurity

(a) Name the metal which is extracted from haematite ore. (b) name one ore of aluminium. Name the aluminium compound present in this ore and write its chemical formula. (c) How is aluminium metal extracted? Explain with the help of an equation. (d) name the electrode at which aluminium metal is produced. (e) Which gas is produced during the extraction of aluminium? at which electrode is this gas produced?

(a) White the steps involved in the extraction of pure metals in the middle of the activity series from their carbonate ores. (b) How is copper extracted from its sulphuric ore ?Explain the variour steps supported by chemical equations. Draw labelled diagram from the electrolytic refining of copper.