Chemistry - Redox Reactions Question with Solution | TestHub

In ${\mathrm{K}}_2\mathrm{C}{\mathrm{r}}_2{\mathrm{O}}_7$, chromium is in its highest state (+6) and is readily reduced to $\mathrm{C}{\mathrm{r}}^{3+}$, so it is a strong oxidising agent. $\mathrm{F}{\mathrm{e}}^{2+}$, ${\mathrm{S}}^{2-}$ and ${\mathrm{I}}^{-}$ contain species in low/intermediate states and behave as reducing agents. Hence (a).