KVPY Sample Paper KVPY Stream-SX Model Paper-5

  • question_answer
    The correct order of the spin-only magnetic moment of metal ions in the following low spin complexes, \[{{[V{{\left( CN \right)}_{6}}]}^{4\,-}},\] \[{{[Fe{{\left( CN \right)}_{6}}]}^{4\,-}},\] \[{{[Ru{{(N{{H}_{3}})}_{6}}]}^{3\,+}},\] and \[[Cr{{\left( N{{H}_{3}} \right)}_{6}}^{2+}]\] is :

    A) \[{{V}^{2+}}>C{{r}^{2+}}>R{{u}^{3+}}>F{{e}^{2+}}\]

    B) \[{{V}^{2+}}>R{{u}^{3+}}>C{{r}^{2+}}>F{{e}^{2+}}\]

    C) \[C{{r}^{2+}}>R{{u}^{3+}}>F{{e}^{2+}}>{{V}^{2+}}\]

    D) \[C{{r}^{2+}}>{{V}^{2+}}>R{{u}^{3+}}>F{{e}^{2+}}\]

    Correct Answer: A

    Solution :

    Due to unpaired electron and pairings electrons due to strong ligands.

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