Q. 22

For the metallurgical process of which of the ores calcined ore can be reduced by carbon?
A. haematite

B. calamine

C. iron pyrites

D. sphalerite

Answer :

Haematite and calamine are the only oxides present. Oxides can be reduced easily by carbon

Reduction of haematite:


2Fe2O3(s) + 3C(s) 4Fe(l) + 3CO2(g)


Reduction of calamine:


ZnCO3(s) ZnO(s) + CO2(g)

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