JEE Main Chemistry question

Statement 1: Europium(II) is more stable than cerium(II). Statement 2: Cerium salts are used as a catalyst in petroleum cracking.

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

Answer: (B)

Solution

has the configuration (stable, half-filled subshell), while has (no such extra stability), so is indeed more stable than — Statement 1 is

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Question ID VK-147374