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JAMIA MILLIA ISLAMIA Jamia Millia Islamia Solved Paper-2006

  • question_answer
        For d-block elements the first ionization potential is of the order

    A)  \[Zn>Fe>Cu>Cr\]

    B)  \[Sc=Ti<V=Cr\]

    C)  \[Zn<Cu<Ni<Co\]

    D)  \[V>Cr>Mn>Fe\]

    Correct Answer: A

    Solution :

                    Key Idea: The ionisation energies increase with increasing atomic number. The trend is irregular among d-block elements
    Element Sc Ti V Cr Mn Fe Co Ni Cu Zn
    IE \[(kJ/mo{{l}^{-1}})\] 631 656 650 652 717 762 758 736 745 905
    \[\therefore \]\[Zn>Fe>Cu>Cr\]is correct order.


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