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  4. Which of the following compounds is(are) coloured due to charge transfer spectra and not due to d-d transitions?

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Q. Which of the following compounds is(are) coloured due to charge transfer spectra and not due to d-d transitions?

NTA AbhyasNTA Abhyas 2020The d-and f-Block Elements

Solution:

$K_{2}Cr_{2}O_{7},KMnO_{4}$ and $CrO_{3}$ are coloured due to charge transfer as in them there is no unpaired d-orbital electron. So d-d electronic transition is not possible.