Q22 of 52 Page 80

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

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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20

Which of the following ores are concentrated by froth floation?

 21

Which of the following reactions occur during calcination?

 23

The main reactions occurring in blast furnace during extraction of iron from

haematite are ________.


 24

In which of the following method of purification, metal is converted to its volatile compound which is decomposed to give pure metal?