Question

${\left[Fe{\left(H_{2}O\right)}_6\right]}^{2+}$ and ${\left[Fe(CN{)}_6\right]}^{4-}$ differ in

• A. geometry, magnetic moment
• B. geometry, hybridization
• C. magnetic moment, colour
• D. hybridisation, number of d-electrons

Answer 1

Answer: (C)

${\left[Fe{\left(H_{2}O\right)}_6\right]}^{2+}$ and ${\left[Fe(CN{)}_6\right]}^{4-}$ differ in magnetic moment and colour. $F{e}^{2+}$ in ${\left[Fe{\left(H_{2}O\right)}_6\right]}^{2+}$



Colour: Pale green $\mu =4.9$ B.M.; octahedral $F{e}^{2+}$ in ${\left[Fe(CN{)}_6\right]}^{4-}$



Colour: Yellow; $\mu =0$; octahedral.