The following ion shows colour not due to d-d transition

$C r_{2} O_{7}^{2 -}$

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$M n O_{4}^{-}$

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$C r O_{4}^{2 -}$

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Solution

The correct option is D
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Both $C r$ and $M n$ in these ions have $d^{0}$ configuration. So there is no scope for d-d transitions. _the colour is due to ligand to metal charge transfer phenomena.

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Similar questions

The following ion shows colour not due to d-d transistion.

d - d

{C r}^{n +}

d - d

n

The colour of $M n O {_{4}}^{-}$ ion is due to:

K M n O {_{4}}^{-}

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