The number of mole of `KMnO_(4)` that will be needed to react completely with one mole of ferrous oxalate in acidic solution is:

Options

A. (a)`0.6` mole
B. (b)`0.4` mole
C. (c )`7.5` mole
D. (d)`0.2` mole

Answer

a

Explanation

In ferrous oxalate ferrous and oxalate ions are oxidized.
`Fe^(2+) rarr Fe^(3+)+e^(-)`
`C_(2)O_(4)^(2-) rarr 2CO_(2)+2e^(-)`
`MnO_(4)^(2-) rarr Mn^(2+)`
Thus eqn. will be `3MnO_(4)^(-)+5FeC_(2)O_(4) rarr`
`implies` 1 mole of ferrous oxalate requires `3//5` moles of `KMnO_(4)`, i.e., 0.6 mole.