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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.

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1 Answer

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(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

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