JEE Main & Advanced Chemistry The d-and f-Block Elements Question Bank Critical Thinking

  • question_answer Atomic number of Cr and Fe are 24 and 26 respectively. Which of the following is paramagnetic with the spin of electron [CBSE PMT 2002]

    A) \[{{[Cr{{(N{{H}_{3}})}_{6}}]}^{+3}}\]

    B) \[[Fe{{(CO)}_{5}}]\]

    C) \[{{[Fe{{(CN)}_{6}}]}^{-4}}\]

    D) \[[Cr{{(CO)}_{6}}]\]

    Correct Answer: A

    Solution :

    All metal carbonyls are diamagnetic cyanide complexes are also diamagnetic.

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