FeC2O4 (molar mass 144 g mol^-1) is oxidised completely by acidified KMnO4 to Fe^3+ and CO2. Its equivalent mass is:

JEE Main levelSingle correct optionDifficulty 2 of 3eq027

$FeC X_{2} O X_{4}$ (molar mass $144 g mo l^{- 1}$ ) is oxidised completely by acidified $KMnO X_{4}$ to $Fe X^{3 +}$ and $CO X_{2}$ . Its equivalent mass is:

Iron loses

1

electron (

Fe X^{2 +} Fe X^{3 +}

) and the oxalate loses

2

electrons (

C X_{2} O X_{4} X^{2 -} 2 CO X_{2}

), so

n = 3

. Equivalent mass

= 144/3 = 48