Chemistry - Complete d-block Question with Solution | TestHub

$\mathrm{C}\mathrm{r}{\mathrm{O}}_4^{2-}$(yellow) changes to$\mathrm{C}{\mathrm{r}}_2{\mathrm{O}}_7^{2-}$(orange) in acidic medium so pH = x = 6.
$2\mathrm{C}\mathrm{r}{\mathrm{O}}_4^{2-}+2{\mathrm{H}}^{+}\to \mathrm{C}{\mathrm{r}}_2{\mathrm{O}}_7^{2-}+{\mathrm{H}}_2\mathrm{O}$
The opposite reaction takes place in basic medium so pH = y = 8.
$\mathrm{C}{\mathrm{r}}_2{\mathrm{O}}_7^{2-}+2\mathrm{O}{\mathrm{H}}^{-}\to 2\mathrm{C}\mathrm{r}{\mathrm{O}}_4^{2-}+{\mathrm{H}}_2\mathrm{O}$