Chemistry - Redox Reactions Question with Solution | TestHub

A sample of ${\mathrm{FeSO}}_4$ and ${\mathrm{FeC}}_2{\mathrm{O}}_4$ is dissolved in ${\mathrm{H}}_2{\mathrm{SO}}_4$. The complete oxidation of sample required $8/3$ eq. Of ${\mathrm{KMnO}}_4$. After oxidation, the reaction mixture was reduced by Zn . On again oxidation by ${\mathrm{KMnO}}_4$ required $\frac{5}{3}$ eq. The mole ratio of ${\mathrm{FeSO}}_4$ and ${\mathrm{FeC}}_2{\mathrm{O}}_4$ is