How many moles of `KMnO_4` are needed to oxidised a mixture of 1 mole of each `FeSO_4" & " FeC_(2)O_4` in acidic medium

Options

A. `4//5 `
B. `5//4`
C. ` 3//4`
D. `5//3`

Answer

A

Explanation

`2KMnO_(4)+ 10FeSO_(4) +8H_(2)SO_(4) rarr K_(2) SO_(4) +2MnSO_(4)+5Fe_(2)(SO_4)_(3)+8H_2O`
10 moles g `FesO_4` requires 2 moles of `KMnO_4`
1 mole of `FeC_(2)O_4` require = 1/5 moles of `KMnO_4`
`6KMnO(4) +10FeC_(2)O_(4)+24H_(2)SO_(4) rarr 3K_2SO_(4) + 6MnSO_(4) +5Fe_(2)(SO_4)_(3)+20CO_(2)+24H_(2)O`
10 mole of `FeC_(2)O_(4)` require = 6 mole of `KMnO_4`
1 mole of `FeC_(2)O_4 ` requires `=6/10 =3/5`
Total moles of `KMnO_(4) ` require `=1/5+3/5 =4/5`