How is magnesium obtained from the following?

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Question

(C) Magnesium is a highly reactive metal. It cannot be obtained by chemical reduction of its oxide with carbon (coke) because $Mg$ has a higher affini

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Electrolysis of molten magnesium salt

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(C) Magnesium is a highly reactive metal. It cannot be obtained by chemical reduction of its oxide with carbon (coke) because $Mg$ has a higher affinity for oxygen than carbon. It is commercially produced by the electrolysis of molten magnesium chloride $(MgCl_2)$ mixed with other chlorides to lower the melting point. Therefore,the correct method is the electrolysis of molten magnesium salt.

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