alumina is dissolved in molten cryolite for electrolysis to obtain aluminium metal give reason
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Aluminium oxide has a very high melting point (over 2000oC) so it would be expensive to melt it. So it is dissolved in molten cryolite -which has a lower melting point than aluminium oxide. The use of cryolite reduces some of the energy costs involved in extracting aluminium.
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