A metal X which is resistant to corrosion is produced by the electrolysis of its molten oxide whereas another metal Y which is also resistant to corrosion is produced by the reduction of its oxide with carbon. Metal X can be used in powder form in thermite welding whereas metal Y is used in making cathodes of ordinary dry cells.(a) Name the metals X and Y.
(b) Which of the two metals is more reactive: X or Y?
(c) Name one ore of metal X. Also write its chemical formula.
(d) Name one ore of metal Y. Also write its chemical formula.
(e) Name one alloy of metal X and one alloy of metal Y.
(a) X is aluminium and Y is zinc as they both are resistant to corrosion.
(b) X (aluminium) is more reactive than Y (Zinc).
(c) An ore of aluminium is Bauxite. Its chemical formula is Al2O3.2H2O.
(d) An ore of Zinc is Calamine. Its chemical formula is ZnCO3.
(e) An alloy of metal X (aluminium) is Duralumin. An alloy of metal Y (Zinc) is Brass.
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