Chemistry - Complete d-block Question with Solution | TestHub

${\mathrm{K}}_2\mathrm{C}{\mathrm{r}}_2{\mathrm{O}}_7,\mathrm{K}\mathrm{M}\mathrm{n}{\mathrm{O}}_4$and$\mathrm{C}\mathrm{r}{\mathrm{O}}_3$are coloured due to charge transfer as in them there is no unpaired d-orbital electron. So d-d electronic transition is not possible.