Ellingham Diagrams

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Ellingham Diagrams: Overview

This Topic covers sub-topics such as Ellingham Diagram, Limitations of Ellingham Diagram and, Applications of Ellingham Diagram

Important Questions on Ellingham Diagrams

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Given below are two statements :

Statement I : According to the Ellingham diagram, any metal oxide with higher ΔG° is more stable than the one with lower ΔG°.

Statement II : The metal involved in the formation of oxide placed lower in the Ellingham diagram can reduce the oxide of a metal placed higher in the diagram.

In the light of the above statements, choose the most appropriate answer from the options given below

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Which of the following statements about the Ellingham Diagram (ED) is FALSE?

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The Ellingham diagram is given for the gaseous oxides BO2 and AO. (Assume A and B are solid metals)

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Which of the following are false about the Ellingham diagram?

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The plot of ΔG° versus temperature for the formation of oxides of elements is called

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Which of the following statement is incorrect?

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In Ellingham diagrams of Δ,G oxide formation VsT, which of the following graphs has negative slope?

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Which of the following statement is correct w.r.t. the following graph?
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Ellingham diagrams are plots of ΔGf°VsT for the formation of:

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Given below are two statements.
Statement I: The choice of reducing agents for metals extraction can be made by using the Ellingham diagram, a plot of ΔG vs temperature.
Statement II: The value of ΔS increases from left to right in the Ellingham diagram.

In the light of the above statements, choose the most appropriate answer from the options given below:

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The statement that is INCORRECT about Ellingham diagram is

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Which of the following metals cannot be obtained by reduction of its metal oxide by aluminium?

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Ellingham diagram is a graphical representation of :

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Considering Ellingham diagram, which of the following metals can be used to reduce alumina?

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Carbon cannot be used in the reduction of Al2O3 because:

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To make the following reduction process spontaneous, temperature should be:

ZnO+CZn+CO

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For a reaction 4 Ms+nO2g2M2Ons

The free energy change is plotted as a function of temperature. The temperature below which the oxide is stable could be inferred from the plot as the point at which :

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An Ellingham diagram provides information about:

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Which of the following are incorrect on basis of above ellingham diagram for carbon?