MHT CET 2025 Chemistry question

Identify the correct decreasing order of stability of complexes formed by divalent metal ions with same ligand

(A)
(B)
(C)
(D)Correct

Answer: (D)

Solution

For the same ligand, stability of complexes of divalent metal ions depends on the charge-to-size ratio and on crystal-field stabilisation. The Irving-Williams series for 3d ions is \mathrm{Mn^{2+} < Fe^{2+} < Co^{2+} < Ni^{2+} < Cu^{2+} > Zn^{2+}}, so forms the most stable complexes and

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Question ID VK-101309