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  4. For d-block elements the first ionization potential is of the order

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Q. For d-block elements the first ionization potential is of the order

JamiaJamia 2006

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.