Assuming complete ionization, same moles of which of the following compounds will require the least amount of acidified `KMnO_(4)` for complete oxidation ?

Options

A. `FeC_(2)O_(4)`
B. `Fe(NO_(2))_(2)`
C. `FeSO_(4)`
D. `FeSO_(3)`

Answer

C

Explanation

`FeC_(2)O_(4)+3KMnO_(4) to Fe^(3+)+CO_(2)+Mn^(2+)+K^(+)+H_(2)O`
1 mole : 3 mole
`Fe(NO_(2))+5KMnO_(4) to Fe^(3+) +NO_(3)^(-)+Mn^(2+)+K^(+)+H_(2)O)`
1 mole : 5 mole
`FeSO_(4)+KMnO_(4) to Fe^(3+)+Mn^(2+)+SO_(4)^(2-)+H_(2)O`
1 mole : 1 mole
`FeSO_(4)+2KMnO_(4) to Fe^(3+)+SO_(4)^(2-)+Mn^(2+)+H_(2)O`
1 mole : 2 mole