CBSE BoardEnglish MediumSTD 12 ScienceChemistry5. Co-ordination chemistry1 Mark
MCQ
The $[Fe(CN)_6 ]^{3-}$ complex ion
A
exhibits planar geometry
B
is diamagnetic
✓
should be very stable
D
has $2$ unpaired electrons
✓
Answer
Correct option: C.
should be very stable
c Both the high charge density of $Fe^{3+}$ in $[Fe(CN)_6]^{3-}$ and strong basic (Lewis) character of the ligand $CN^-$ attribute to the stability of the complex.
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