Q12 of 52 Page 77


Below point ‘A’ FeO can ______________.


Below point ‘A’, the carbon monoxide line lies below that of oxidation of Fe to FeO. The difference in ∆G is negative in this range and only carbon monoxide can reduce FeO.

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10

Extraction of gold and silver involves leaching the metal with CN– ion. The metal is recovered by ________________.

 11

Choose the correc 13


For the reduction of FeO at the temperature corresponding to point D, which of the following statements is correct?


 14


At the temperature corresponding to which of the points in Fig, FeO will be reduced to Fe by coupling the reaction 2FeO → 2Fe + O2 with all of the following reactions?


(a) C + O2→ CO2


(b) 2C + O2→ 2CO and


(c) 2CO + O2→2 CO2