JEE Main Chemistry question

Statement 1: Manganese has a less favourable electron affinity than its neighbours on either side. Statement 2: The magnitude of an element's electron affinity depends on the element's valence shell electron configuration.

(A)Statement 1 is True, Statement 2 is True; Statement 2 is correct explanation for Statement 1
(B)Statement 1 is True, Statement 2 is True; Statement 2 is not correct explanation for Statement 1Correct
(C)Statement 1 is True, Statement 2 is False
(D)Statement 1 is False, Statement 2 is True

Answer: (B)

Solution

Mn () has a stable half-filled d-subshell plus a filled s-subshell, making it reluctant to accept an extra electron, so its electron affinity is indeed less favourable than that of its neighbours Cr (, favourable EA since gaining an electron completes ) and Fe (); Statement 1 is

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Question ID VK-133308