Which of the following compounds is not coloured?

Question

Which of the following compounds is not coloured? (A) Na 2[ Cu ( Cl )4] (B) Na[Cd(Cl)4] (C) K4[Fe(CN)6] (D) K3[Fe(CN)6]

Tardigrade Admin · Accepted Answer

Complex compound having lack of unpaired electron is colourless. Among the given complexes, K 4[ Fe ( CN )6] has no unpaired electron as CN -leeing strong field ligand causes pairing of electrons. Thus, it is not coloured.

Q. Which of the following compounds is not coloured?

$N a_{2} [C u (Cl)_{4}]$

$N a [C d (Cl)_{4}]$

$K_{4} [F e (CN)_{6}]$

$K_{3} [F e (CN)_{6}]$

Complex compound having lack of unpaired electron is colourless. Among the given complexes, $K_{4} [F e (CN)_{6}]$ has no unpaired electron as CN $^{-}$ leeing strong field ligand causes pairing of electrons. Thus, it is not coloured.

Q. Which of the following compounds is not coloured?

Na2​[Cu(Cl)4​]

Na[Cd(Cl)4​]

K4​[Fe(CN)6​]

K3​[Fe(CN)6​]

Complex compound having lack of unpaired electron is colourless. Among the given complexes, K4​[Fe(CN)6​] has no unpaired electron as CN −leeing strong field ligand causes pairing of electrons. Thus, it is not coloured.

$N a_{2} [C u (Cl)_{4}]$

$N a [C d (Cl)_{4}]$

$K_{4} [F e (CN)_{6}]$

$K_{3} [F e (CN)_{6}]$

Complex compound having lack of unpaired electron is colourless. Among the given complexes, $K_{4} [F e (CN)_{6}]$ has no unpaired electron as CN $^{-}$ leeing strong field ligand causes pairing of electrons. Thus, it is not coloured.