Which of the following process is use in the extractive metallurgy of magnesium ?
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a
Fused salt electrolysis
b
Self-reduction
c
aqueous solution electrolysis
d
Thermite reduction
answer is A.
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Detailed Solution
Highly electropositive metals (e.g., alkali and alkaline earth metals and Al) are extracted by the electrolysis of their fused salts.Cathode : Mg2+ + 2e- → MgAnode : 2Cl- → Cl2 + 2e-