JEE Main & Advanced Chemistry The d-and f-Block Elements / d तथा f ब्लॉक के तत्व Question Bank Critical Thinking

  • question_answer
    Which of the following pair will have effective magnetic moment equal

    A) \[C{{r}^{+3}}\] and \[M{{n}^{+2}}\]

    B) \[C{{r}^{+2}}\] and \[F{{e}^{+2}}\]

    C) \[{{V}^{+2}}\] and \[S{{c}^{+3}}\]

    D) \[T{{i}^{+2}}\] and \[{{V}^{+2}}\]

    Correct Answer: B

    Solution :

    \[C{{r}^{+2}}\] and \[F{{e}^{+2}}\] \[C{{r}^{+2}}\,-\,3{{d}^{4}}\] 4 unpaired electrons \[F{{e}^{+2}}\,-\,3{{d}^{6}}\] 4 unpaired electrons

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