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 or 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.
(b) X is more reactive than Y.
(c) Bauxite; Al2O3.2H2O
(d) Calamine, ZnCO3
(e) Alloy of metal X : Duralumin ; Alloy of metal Y : Brass