Q. The most stable ion is
A) $\left\lbrack Fe(OH)_{5} \right\rbrack^{3 -}$
B) $\left\lbrack {FeCl}_{6} \right\rbrack^{3 -}$
C) $\left\lbrack Fe(CN)_{6} \right\rbrack^{3 -}$
D) $\left\lbrack Fe\left( H_{2}O \right)_{6} \right\rbrack^{3 +}$
Explanation
(c)
$CN^{-}$and $OH^{-}$ are strong nucleophiles.
$\left\lbrack Fe(OH)_{5} \right\rbrack^{3 -}$ is not formed.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.