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`.

Explanation

(a) X is aluminium and Y is zinc
(b) X is more reactive
(c) Bauxite, `Al_(2)O_(3),2H_(2)O`
(d) Calamine, `ZnCO_(3)`
(e) alloy of metal X, Duralumin, Alloy of metal Y: Brass