7
Question
Electrolytic reduction is employed in the extraction of:
Electrolytic reduction is employed in the extraction of:
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Solution
The correct options are
B aluminium
C potassium
D calcium
Oxides of strong electro-positive metals, such as K, Ca, Na, Al and Mg, are very stable. It is difficult to reduce them into metallic state by carbon reduction.
Such metals are extracted by passing electricity through their fused chlorides/oxides/hydroxides (electrolytic method).
Copper is extracted by auto reduction process. Only the refining of copper is done electrolytically.
Options B,C and D are correct.
B aluminium
C potassium
D calcium
Oxides of strong electro-positive metals, such as K, Ca, Na, Al and Mg, are very stable. It is difficult to reduce them into metallic state by carbon reduction.
Such metals are extracted by passing electricity through their fused chlorides/oxides/hydroxides (electrolytic method).
Copper is extracted by auto reduction process. Only the refining of copper is done electrolytically.
Options B,C and D are correct.
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