JEE Main 2022 · 26 Jun · Shift 1 · Chemistry Q67

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ChemistrySingle correct+4 / -1Question 67 of 90

Given below are two statements :

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

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 :

Both Statement I and Statement II are correct.

Both Statement I and Statement II are incorrect.

Statement I is correct but Statement II is incorrect.

Statement I is incorrect but Statement II is correct.

Answer and worked solution

Official answer: D

Statement I is wrong: the oxide with the more negative (lower) $\Delta G°$ is the more stable.

Statement II is right: a metal whose oxide line lies lower can reduce an oxide lying higher.

(D)

Topics:Extraction and thermodynamics (Ellingham)

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JEE Main 2022 · 26 Jun · Shift 1, Chemistry question 67