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Question
Given below are two statements.
Statements I: The choice of reducing agents for metal extraction can be made by using Ellingham diagram, a plot of ΔG vs temperature.
Statements II: The value of ΔS increases from left to right in Ellingham diagram. In the light of above statements, choose the most appropriate from the options given below:
Options
Both Statement I and statements II are false.
Both Statement I and statements II are true.
Statement I is false but statement II is true.
Statement I is true but statement II is false.
Solution
Statement I is true but statement II is false.
Explanation:
Given statement - I is true. As in a number of processes, one element is used to reduce the oxide of another metal. Any element will reduce the oxide of other metals which lie above it in the Ellingham diagram because the free energy change will become more negative.
Given statement - II is false. As the value of ΔS decreases from left to right in Ellingham diagram.
