From the Ellingham graphs of carbon, which of the following statements is false?

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${CO}_{2}$ is more stable than CO at less than 983 K

CO reduces ${Fe}_{2} O_{3}$ to Fe at less than 983 K

CO is less stable than ${CO}_{2}$ at more than 983 K

CO reduces ${Fe}_{2} O_{3}$ to Fe in the reduction zone of blast furnace

answer is C.

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Detailed Solution

From the Ellingham graphs of carbon, It is obtained that CO is less stable than carbon dioxide at more than 983K

Initially, carbon dioxide is more stable than CO on the Ellingham graph because its $Δ {fG}_{\circ}$ is more negative, but as the temperature rises above 983K, the circumstances are flipped and CO's $Δ {fG}_{\circ}$ is more negative, making CO more stable than carbon dioxide at that temperature.

Hence the correct option is C.

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