Chemistry - Complete d-block Question with Solution | TestHub

$\left(\mathrm{a}\right)\underset{+6}{\mathrm{C}{\mathrm{r}}_2{\mathrm{O}}_7^{2-}}+\underset{+4}{\mathrm{S}{\mathrm{O}}_2}+2{\mathrm{H}}^{+}\to \underset{+3}{2\mathrm{C}{\mathrm{r}}^{3+}}+\underset{+6}{3\mathrm{S}{\mathrm{O}}_4^{2-}}+{\mathrm{H}}_2\mathrm{O}$
$\left(\mathrm{b}\right)\mathrm{}\underset{+6}{2\mathrm{C}\mathrm{r}{\mathrm{O}}_4^{2-}}+2{\mathrm{H}}^{+}\to \underset{+6}{\mathrm{C}{\mathrm{r}}_2{\mathrm{O}}_7^{2-}}+{\mathrm{H}}_2\mathrm{O}$
$\left(\text{c}\right)\underset{\text{+6}}{{\text{CrO}}_{\text{2}}{\text{Cl}}_{\text{2}}}\text{+}\text{2NaOH}\to \text{Na}{}_{\text{2}}{\text{CrO}}_{\text{4}}$
$\left(\mathrm{d}\right)\mathrm{}\underset{+6}{\mathrm{C}{\mathrm{r}}_2{\mathrm{O}}_7^{2-}}+2\mathrm{O}{\mathrm{H}}^{-}\to \underset{+6}{2\mathrm{C}\mathrm{r}{\mathrm{O}}_4^{2-}}+{\mathrm{H}}_2\mathrm{O}$