In acidic KMnO4 titrations, the number of moles of KMnO4 needed for 1 mol of FeC2O4 : 1 mol of FeSO4 : 1 mol of H2C2O4 respectively is in the ratio

JEE Main levelSingle correct optionDifficulty 2 of 3eq062

In acidic $KMnO X_{4}$ titrations, the number of moles of $KMnO X_{4}$ needed for 1 mol of $FeC X_{2} O X_{4}$ : 1 mol of $FeSO X_{4}$ : 1 mol of $H X_{2} C X_{2} O X_{4}$ respectively is in the ratio

Moles of electrons lost per mole:

FeC X_{2} O X_{4}

gives 1 (Fe) + 2 (oxalate) = 3;

FeSO X_{4}

gives 1;

H X_{2} C X_{2} O X_{4}

gives 2. Since each mole of

KMnO X_{4}

accepts 5 electrons the mole ratio of permanganate is 3 : 1 : 2.