The colour of${\mathrm{KMnO}}_4$ solution is decolourised by ${\mathrm{Fe}}^{2+}$ solution, one mole of ${\mathrm{Fe}}^{2+}$ reacts with x moles of ${\mathrm{KMnO}}_4$. Find x.

${\mathrm{MnO}}_4^{-}+5{\mathrm{Fe}}^{2+}+8{\mathrm{H}}^{+}⟶5{\mathrm{Fe}}^{3+}+{\mathrm{Mn}}^{2+}+4{\mathrm{H}}_2\mathrm{O}$

In the above reaction 1 mole of ${\mathrm{MnO}}_4^{-}$ – reacts with 5 mole of ${\mathrm{Fe}}^{2+}$. or 1 mole of ${\mathrm{Fe}}^{2+}$ reacts with 0.2 mole of ${\mathrm{MnO}}_4^{-}$.