Manipal Entrance Test 2016 Chemistry Paper

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Question : 48 of 50

Marks: +1, -0

Electrolytic reduction of alumina to aluminium by Hall-Heroult process is carried out

in the presence of NaCl
in the presence of Hnorite
in the presence of cryolite which forms a melt with lower melting temperature
in the presence of cryolite which forms a melt with higher melting temperature

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