KCET 2011 Chemistry Solved Paper

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Question : 25 of 60

Marks: +1, -0

Carbon cannot reduce Fe2O3 to Fe at a temperature below 983K because ............

free energy change for the formation of CO is more negative than that of Fe2O3
CO is thermodynamically more stable than Fe2O3
carbon has higher affinity towards oxygen than iron
iron has higher affinity towards oxygen than carbon

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