7(c)
Complete the following by selecting the correct option from the choices given:
(i) The metal which does not react with water or dilute H2SO4 but reacts with concentrated H2SO4 is ............... (Al/Cu/Zn/Fe)
(ii) The metal whose oxide, which is amphoteric, is reduced to metal by carbon reduction ............... (Fe/Mg/Pb/Al)
(iii) The divalent metal whose oxide is reduced to metal by electrolysis of its fused salt is ............... (Al/Na/Mg/K)
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(i) The metal which does not react with water or dilute H2SO4 but reacts with concentrated H2SO4 is Cu.
(ii) The metal whose oxide, which is amphoteric, is reduced to metal by carbon reduction — Pb.
(iii) The divalent metal whose oxide is reduced to metal by electrolysis of it's fused salt is — Mg.