1) In dilute aqueous H2SO4, the complex diaquadioxalatoferrate (II) is oxidised by MnO4-. For this reaction, the ratio of the rate of change [H+] to the rate of change of [MnO4-] is A) 4 B) 5 C) 6 D) 8 Answer: Option DExplanation:The balanced redox reaction is $MnO_{4}^{-}+[Fe(H_{2}O)_{2}(C_{2}O_{4})_{2}]^{2-}+8H^{+}\rightarrow Mn^{2+}+Fe^{3+}+4CO_{2}+6H_{2}O$ $\Rightarrow$ $\frac{r[H^{+}]}{r[MnO_{4}^{-}]}=\frac{8}{1}=8$
