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Q.

Extraction of aluminium from aluminium oxide (Al2O3)is best done by

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a

electrolytic reduction of Al2O3

b

reduction of Al2O3 with carbon

c

reduction of Al2O3 with sodium

d

reduction of Al2O3 with CO

answer is A.

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Detailed Solution

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  • Melting point of pure Aluminia is 2000 0C and is not a good conductor of electricity. 
  • It is fused with cryolite and fluorspar to lower the melting point and improves conductivity. 
  • At cathode metallic aluminium is liberated. Hence, extraction of aluminium from aluminium oxide Al2O3 is best done by electrolytic reduction of Al2O3.
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Extraction of aluminium from aluminium oxide (Al2O3)is best done by