Which complex is most stable ? Where k_d , = Dissociation constan… - Vidyadip

MCQ

Which complex is most stable ?

Where $k_d\, =$ Dissociation constant

A
$[Cu(CN)_2]^-\, ;\, k_d = 1\times10^{-16}$
B
$[Fe(CN)_6^-]^{-4}\, ;\, k_d = 1\times10^{-37}$
✓
$[Fe(CN)_6]^{-3}\, ;\, k_d = 1\times10^{-44}$
D
$[Ag(CN)_2]^-\, ;\, k_d = 1\times10^{-20}$

✓

Answer

Correct option: C.

$[Fe(CN)_6]^{-3}\, ;\, k_d = 1\times10^{-44}$

c
Stability $\propto$ $\frac{1}{{{K_d}}}$

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