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A solution contains Fe^(2+), Fe^(3+) and...

A solution contains `Fe^(2+), Fe^(3+)` and `T^(-)` ions. This solution was treated with iodine at `35^(@)C. E^(@)` for `Fe^(3+), Fe^(2+)` is `0.77 V` and `E^(@)` for `I_(2)//2I^(-)` = 0.536 V. The favourable redox reaction is:

A

`I^(-)` will be oxidised to `I_(2)`

B

`Fe^(2+)` will be oxidised to `Fe^(3+)`

C

`I_(2)` will be reduced to `I^(-)`

D

There will be no redox reaction

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The correct Answer is:
A
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A solution contains Cr^(+2),Cr^(+3) and I^(-) ions, This solution was treated with iodine at 35^(@)C.E^(@) for cr^(+3)//Cr^(+2) is -0.41V and E^(@) for I_(2)//2I^(-)=0.536V , The favourable redox reaction is :-

E^(@) for Fe//Fe^(2+) is +0.44 V and E^(@) for Cu//Cu^(2+) is -0.32 V . Then, in the cell,

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E^(o) for the reaction Fe + Zn^(2+) rarr Zn + Fe^(2+) is – 0.35 V. The given cell reaction is :

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AAKASH INSTITUTE-REDOX REACTIONS-ASSIGNMENT SECTION - C
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