1) If stoichiometric quantites of $KMnO_{4}$ and $K_{2}Cr_{2}O_{7}$ mixture is added for the oxidation of $Fe^{2+}$ to $Fe^{3+}$ in acidic medium , then $Fe^{2+}$ will be oxidised A) equally by $KMnO_{4}$ and $K_{2}Cr_{2}O_{7}$ B) more by $KMnO_{4}$ C) more by $K_{2}Cr_{2}O_{7}$ D) no reaction Answer: Option BExplanation: $KMnO_{4}+K_{2}Cr_{2}O_{7}$ In the process $KMnO_{4}$ is strong oxidising agent in acidic medium . it oxidises $Fe^{2+} $ to $Fe^{3+}$ . $K_{2}Cr_{2}O_{7}$ is weak oxidising agent in acidic medium
