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Volumetric titrations involving KMnO(4),...

Volumetric titrations involving `KMnO_(4)`, are carried out only in presence of dilute `H_(2)SO_(4)` but not in the presence of HCI or `HNO_(3)` This is because oxygen produced from `KMnO_(4)` + dil: `H_(2)SO_(4)`, is used only for oxidizing the reducing agent. Moreover, H2SO4 does not give any oxygen of its own to oxidize the reducing agent. In case HCI is used, the oxygen produced from `KMnO_(4) + HCI` is partly used up to oxidize HCI and in case `HNO_(3)` is used, it itself acts as oxidizing agent and partly oxidizes the reducing agent. `KMnO_(4)`, in various mediums gives following products`Mn^(7+)overset(H^(+))toMn^(2+)`
`Mn^(7+)overset(H_(2)O)toMn^(4+)`
`Mn^(7+)underset(OH^(-))toMn^(6+)`
QThe equivalent weight of `KMnO_(4)`, in the given reaction is`KMnO_(4)toK_(2)MnO_(4)+ MnO_(2) + O_(2)`

A

`(M)/(6)`

B

`(M)/(2)`

C

M

D

`(M)/(3)`

Text Solution

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The correct Answer is:
B
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