Question

The colour of $Mn{O}_4^{-}$ ion is due to charge transfer.

If true enter 1, else enter 0.

Answer 1

$Mn{O}_4^{-}$
Here, $Mn$ is in $+7$ oxidation state.

The electronic configuration of Mn is $\left[Ar\right]4s^{2}3d^5$. Mn in its +7 oxidation state means $d^0$ electron. Its colour is therefore, due to charge transfer spectra and not due to paramagnetism or d-d transition.

harge transfer complex involves electron transfer between metal ion and the ligands.
Hence, the statement is true.