Chemistry - Redox Reactions Question with Solution | TestHub

${\text{X}}^{\text{n}+}\to \stackrel{+5}{\text{X}}{\text{O}}_3^{-}+\left(5-\text{n}\right)e^{-}$

${\text{Cr}}_2{\text{O}}_7^{2-}+14{\text{H}}^{+}+6{\text{e}}^{-}\to 2{\text{Cr}}^{3+}+7{\text{H}}_2\text{O}$

Making no. of moles of electrons same for oxidation and reduction reaction

$6\times 10^{-3}\times 6=\left(5-\text{n}\right)\times 9\times 10^{-3}$

Implies$\text{n}=1$