Q. 963.8( 5 Votes )
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.
(b) Among the two metals X and Y, X is more reactive then that of the Y.
(c) the name of the ore is Bauxite and its chemical formula is Al2O3.2H2O.
(d) The name of the ore of metal Y is Calamine and its chemical formula is ZnCO3.
(e) The name of the alloy of metal X is Duralumin and the name of the alloy of metal Y is Brass.
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(a) Write the steps involved in the extraction of pure metals in the middle of the activity series from their carbonate ores.
(b) How is copper extracted from its sulphide ore? Explain the various steps supported by chemical equations. Draw labelled diagram for the electrolytic refining of copper.
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