Question

Ceric ammonium sulphate and potassium permanganate are used as oxidising agents in acidic medium for oxidation of ferrous ammonium sulphate to ferric sulphate. The ratio of number of moles of cerric ammonium sulphate required per mole of ferrous ammonium sulphate to the number of moles of `KMnO_(4)` required per mole of ferrous ammonium sulphate, is
A. `5.0`
B. `0.2`
C. `0.6`
D. `2.0`

Answer 1

Correct Answer - A
`Fe^(2+)+Ce^(4+) rarr Fe^(3+)+Ce^(3+)`
`5 Fe^(2+)+Mn O_(4)^(-)+8 H^(+) rarr 5 Fe^(3+)+ Mn^(2+) + 4H_(2)O`
`:. ("Moles of cerric ammonium sulphate")/("Moles of potassium permagnate")=1/(1//5)=5.0`