Question

The number of moles of `KMnO_(4)` that will be needed to react completely with one mole of ferrous oxalate in acidic solution is:
A. `3/5`
B. `2/5`
C. `4/5`
D. `1`

Answer 1

Correct Answer - A
`FeC_(2)O_(4) hArr Fe^(2+) + C_(2)P_(4)^(2-) : MnO_(4)^(-) " oxidises " Fe^(2+) and C_(2)O_(4)^(2-)` both
`F^(2+) + C_(2)O_(4)^(2-) rarr Fe^(3+) + 2CO_(2) + 3e^(-) , MnO_(4)^(-) + 5e^(-) rarr Mn^(2+) , 5Fe C_(2)O_(4) -= 3MnO_(4)^(-) or 1 Fe C_(2)O_(4) -= (3)/(5) MnO_(4)^(-)`