KCET 2010 Chemistry Solved Paper

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Question : 26 of 60

Marks: +1, -0

Carbon can reduce ferric oxide to iron at a temperature above 983K because ..................

carbon has a higher affinity towards oxidation than iron.
carbon monoxide formed is thermodynamically less stable than ferric oxide.
iron has a higher affinity towards oxygen than carbon.
free energy change for the formation of carbon dioxide is less negative than that for ferric oxide.

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