Which of the following substances are colored | vedclass

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(D) In $K_2Cr_2O_7$ $(Cr^{6+})$ and $KMnO_4$ $(Mn^{7+})$,the metal ions have a $d^0$ configuration,meaning there are no electrons available for $d-d$

Vedclass · Accepted Answer

All of these

Vedclass · Answer

(D) In $K_2Cr_2O_7$ $(Cr^{6+})$ and $KMnO_4$ $(Mn^{7+})$,the metal ions have a $d^0$ configuration,meaning there are no electrons available for $d-d$ transitions.However,these compounds are intensely colored due to $Charge \ Transfer \ Spectra$ (specifically,ligand-to-metal charge transfer).In $K_4[Fe(CN)_6]$,the color is due to the presence of the complex ion,but the question specifically targets compounds that exhibit color without $d-d$ transitions.Both $K_2Cr_2O_7$ and $KMnO_4$ are classic examples of this phenomenon.Therefore,the correct answer is $D$ (All of these),as $K_4[Fe(CN)_6]$ also exhibits color due to charge transfer or other electronic transitions in the complex.

Which of the following substances are colored even in the absence of $d-d$ transitions?

Similar Questions

Statement $(I)$ $Co^{2+}$ has a higher magnetic moment than $Cr^{3+}$.
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Which of the following orders is correct?

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