Given the standard oxidation potentials `Fe overset(+0.4V)rarr Fe^(2+) (aq.) overset(-0.8V)rarr Fe^(3+) (aq.)` `Fe overset(+0.9V)rarr Fe(OH)_(2) overs

Monjur Alahi

Given the standard oxidation potentials
`Fe overset(+0.4V)rarr Fe^(2+) (aq.) overset(-0.8V)rarr Fe^(3+) (aq.)`
`Fe overset(+0.9V)rarr Fe(OH)_(2) overset(0.6V)rarr Fe(OH)_(3)`
It is easier to oxidise `Fe^(2+) " to " Fe^(3+)in
A. acidic medium
B. alkaline medium
C. neutral medium
D. both in acidic and alkaline mediums


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Salim Ahmed Kawsar

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Correct Answer - B
`E_(Fe^(2+)//Fe^(3+))^(@)` is positive in alkaline solution, therefore, it is easier to oxidise `Fe^(2+) " to " Fe^(2+)` in alkaline medium

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