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In the extraction of aluminium by Hall-Heroult process, purified `Al_(2)O_(3)` is mixed with `CaF_(2)` toA. lower the melting point of `Al_(2)O_(3)`B. increase the conductivity of molten mixture.C. reduce `Al^(3+)` (aq) into Al (s).D. act as catalyst. |
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Answer» Correct Answer - A::B are both correct options. |
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