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Which of the following process is used in the extractive metallurgy of magnesium ?A. Fused salt electrolysisB. Self-reductionC. Aqueous solution electrolyisisD. Thermite reduction |
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Answer» Correct Answer - A Anhydrous magnesium chloride is fused with `NaCl` and anhydrous calcium chloride. The mixture is electrolysed at `700^@ C` in the presence of an inert gas in an electrolytic cell. Magnesium is discharged at cathode. The purpose of the addition of `NaCl` and `CaCl` to anhydrous `MgCl_(2)` is to lower to fusion temperature and make the fused mass a good conductor of electricity. |
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