Which of the following compounds has colour but no unpaired electrons?

Question

Which of the following compounds has colour but no unpaired electrons? (A) KMnO 4 (B) K 2 MnO 4 (C) MnSO 4 (D) MnCl 2

Tardigrade Admin · Accepted Answer

In KMnO 4, Mn is in +7 oxidation state. Mn 7+(Z=25) longrightarrow [ Ar ]18 3 d0 4 s0 It has no unpaired electron but still KMnO 4 is dark pink in colour due to charge transfer spectra.

Q. Which of the following compounds has colour but no unpaired electrons?

$K M n O_{4}$

$K_{2} M n O_{4}$

$M n S O_{4}$

$M n C l_{2}$

In $K M n O_{4}, M n$ is in $+ 7$ oxidation state.

$M n^{7 +} (Z = 25) ⟶ [A r]^{18} 3 d^{0} 4 s^{0}$

It has no unpaired electron but still $K M n O_{4}$ is dark pink in colour due to charge transfer spectra.

Q. Which of the following compounds has colour but no unpaired electrons?

KMnO4​

K2​MnO4​

MnSO4​

MnCl2​

In KMnO4​,Mn is in +7 oxidation state. Mn7+(Z=25)⟶[Ar]183d04s0 It has no unpaired electron but still KMnO4​ is dark pink in colour due to charge transfer spectra.

$K M n O_{4}$

$K_{2} M n O_{4}$

$M n S O_{4}$

$M n C l_{2}$

In $K M n O_{4}, M n$ is in $+ 7$ oxidation state.

$M n^{7 +} (Z = 25) ⟶ [A r]^{18} 3 d^{0} 4 s^{0}$

It has no unpaired electron but still $K M n O_{4}$ is dark pink in colour due to charge transfer spectra.