Carbon cannot reduce Fe_2O_3 to Fe at a temperature below 983 K because **[K CET 2011]**

JEE Main Chemistry question

Chemistry General Principles and Processes of Isolation of Elements (Metallurgy)JEE Main

Not in JEE Main or NEET syllabus

Carbon cannot reduce to Fe at a temperature below 983 K because **[K CET 2011]**

(A)Free energy change for the formation of CO is more negative than that of
(B)CO is thermodynamically more stable than
(C)Carbon has higher affinity towards oxygen than ironCorrect
(D)Iron has higher affinity towards oxygen than carbon

Answer: (C)

Solution

On an Ellingham diagram, the free-energy-of-formation lines for and cross at about 983 K. Below this crossing point, iron's oxide is thermodynamically more stable, so carbon's

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Question ID VK-134754