JEE Main Chemistry question

Chemistry General Principles and Processes of Isolation of Elements (Metallurgy)JEE Main

Not in JEE Main or NEET syllabus

Statement 1: The reduction of a metal oxide is easier if the metal formed is in liquid state at the temperature of reduction.

Statement 2: The value of entropy change of the reduction process is more on the positive side when the metal formed is in liquid state.

(A)Assertion is True, Reason is True; Reason is correct explanation for AssertionCorrect
(B)Assertion is True, Reason is True; Reason is not correct explanation for Assertion
(C)Assertion is True, Reason is False
(D)Assertion is False, Reason is True

Answer: (A)

Solution

On an Ellingham diagram, when the metal produced is in the liquid rather than solid state, the entropy increase accompanying the reduction (ΔS) becomes more positive (since a liquid has higher entropy than a solid); since $Δ G=Δ

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Question ID VK-145255