Which of the following statements is/are correct :

Options

A. 0.2 moles of `KMnO_(4)` will oxidise one mole of ferrous ions to ferric ions in acidic medium.
B. 1.5 moles of `KMnO_(4)` will oxidise 1 mole of ferrous oxalate to one mole of ferric ion and carbon dioxide in acidic medium in acidic medium.
C. 0.6 moles of `KMnO_(4)` will oxidise 1 mole of ferrous oxalate to one mole of ferric ion and carbon dioxide in acidic medium.
D. 1 mole of `K_(2)Cr_(2)O_(7)` will oxidise 2 mole of ferrous oxalate to ferric ions and carbon dioxide in acidic medium.

Answer

A, C, D

Explanation

`MnO_(4)^(-)+5e^(-)+8H^(+)rarrMn^(2+)+4 H_(2)O`
`rArr` 1 mole of `MnO_(4)^(-)` accepts 5 mole of `e^(-)`
1/5 mole of `MnO_(4)^(-)` accepts 1 mole of `e^(-)`
`rArr ` 0.2 mole of `MnO_(4)^(-)` accepts 1 mole of `e^(-)`
`rArr `0.6 mole of `MnO_(4)^(-)` accepts 1 mole of `e^(-)`
`Fe^(2+)rarrFe^(3+)+e^(-)`
`rArr ` 1mole of `Fe^(2+)` will liberate 1 mole of `e^(-)`
`Cr_(2)O_(7)^(2-)` will accept 6 moles of `e^(-)`
1 mole of `FeC_(2)O_(4)rarrFe^(3+)+CO_(2)+3e^(-)`
`rArr` 1 moles of ferrous oxalate gives 3 moles of `e^(-)`
`rArr` 0.2 moles of `KMnO_(4)`=1/5 moles of `KMnO_(4)` oxidises 1 mole of `Fe^(2+)` ion. (Tallies with statement A)
0.6 moles of `KMnO_(4)`=3/5 moles of `KMnO_(4)` will oxidise 1 mole of ferrous oxalate. (Tallies with statement C)
1 mole of `K_(2)Cr_(2)O_(7)` will oxidise 2 moles of ferrous oxalate. (Tallies with statement D)
Hence, (A), (C), (D) are correct while (B) is incorrect.