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

1. Both Statement I and Statement II are true
2. Statement I is false but Statement II is true
3. Both Statement I and Statement II are false
4. Statement I is true but Statement II is false

Correct answer: Statement I is true but Statement II is false

Solution

Statement I is correct because the Ellingham diagram helps in determining the feasibility of metal extraction by showing the relationship between Gibbs free energy and temperature for various reactions. Statement II is incorrect as the change in entropy (ΔS) does not consistently increase from left to right in the diagram; it varies depending on the specific reactions represented.

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