Q. Which of the following ions form most stable complex compound?
A) $Mn^{2 +}$
B) $Ni^{2 +}$
C) $Fe^{2 +}$
D) $Cu^{2 +}$
Explanation
(d)
The magnitude of stability constants for some divalent metal ions of the first transition series with oxygen or nitrogen donor ligands increases in the order
$Mn^{2 +} < Fe^{2 +} < Co^{2 +} < Ni^{2 +} < Cu^{2 +} < Zn^{2 +}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.