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Question 4 What method is used to obtain pure aluminum metal from A1203? Hall process calcination powder metallurgy smelting leaching Question 5 Which substance is the best conductor of electricity? arsenic tellurium silver boron SONY

Answer 1

The method is aluminium metal Hall process. used from to obtaine pare Al₂O3 (Alumina) is & In this process, pure alumina (Al2O3) and cryolite (Naz Alfo) mixture are electro- lysing to get pure 'All metalo

The best conductor of electricity is Silver. silver' is the best conductor of electricity due to presence of a higher number of movable free electrons.
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