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JEE Main & Advanced Chemistry Coordination Chemistry Question Bank Nomenclature, Oxidation state and EAN number

  • question_answer
    The IUPAC name of \[{{[Cr{{(N{{H}_{3}})}_{6}}]}^{3+}}\] is [Pb. CET 2001]

    A) Hexamminechromium (VI) ion

    B) Hexamminechromium (III) ion

    C) Hexamminechromium (II) ion

    D) Hexamminechloride

    Correct Answer: B

    Solution :

    In the given ion \[{{[Cr{{(N{{H}_{3}})}_{6}}]}^{3+}}\], the oxidation state of chromium is +3 and here \[6N{{H}_{3}}\] ligand are attached to the central metal atom. Therefore its IUPAC name is hexamminechromium (III) ion.


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