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State True/False Metals can be recover...

State True/False
Metals can be recovered from their ores by chemical methods.

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Give reasons for the following : (i) Metals can be recovered from their ores by chemical methods. (ii) High purity metals can be obtained by zone refining method. (iii) Why is sodium choride added during electrolysis of fused anhydrous magnesium chloride ? (iv) Why is chalcocite roasted and not calcinated during recovery of copper ?

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Knowledge Check

  • The metal which can be extracted from the bauxite ore is:

    A
    Malachite -Cu
    B
    Calamine-Zn
    C
    Chromite -Cr
    D
    Dolomite -Al

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