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Question
Which of the following are added to purified alumina?
Options
Na3AlF6
CaF2
Both Na3AlF6 and CaF2
Neither Na3AlF6 nor CaF2
MCQ
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Solution
Both Na3AlF6 and CaF2
Explanation:
Cryolite (Na3AlF6) and fluorspar (CaF2) are both added to purified alumina to lower its extremely high melting point and enhance its overall electrical conductivity.
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