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Ni(II) compounds are more stable than Pt(II) compounds but Ni (IV) compounds are less stable than Pt (IV) compounds. Why? |
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Answer» We know that an element having low ΔiH is less stable & its ion is more stable. It is experimentally observed that sum of first & second ionization enthalpies of Ni is less than that of Pt so, Ni(II) compounds are more stable than Pt(II) compounds. It is further observed that sum of the first four ionization enthalpies of Ni is much higher than that of Pt. Hence Ni (IV) compounds are less stable than Pt (IV) compounds. |
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