Which of the following statement (s) is (are) correct for the extractive metallurgy of aluminium ? (1) Red bauxite contains the impurities of iron oxides SiO_(2) and TiO_(2) (2) Red bauxite is purified by hall's and Serpeck's process (3) Hall - Heroult process is used for the electrolytic reduction of molten alumina dissolved in molten cryolite (4) In electrolytic reduction of alumina fluorine gas is liberated at anode as by product

Which of the following statement (s) is (are) correct for the extracti

1.	Which of the following statement (s) is (are) correct for the extractive metallurgy of aluminium ? (1) Red bauxite contains the impurities of iron oxides SiO_(2) and TiO_(2) (2) Red bauxite is purified by hall's and Serpeck's process (3) Hall - Heroult process is used for the electrolytic reduction of molten alumina dissolved in molten cryolite (4) In electrolytic reduction of alumina fluorine gas is liberated at anode as by product
Answer» 1, 2 1, 3 1, 4 3, 4 Answer :B