Standard electrode potential data are useful for understanding the suitability of an oxidant in a redox titration. Some

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Q 2670034816.     Standard electrode potential data are useful for understanding the suitability of an oxidant in a redox titration. Some half-cell
reactions and their standard potentials are given below:

`Mn_4^(-) (aq)+8H^(+)(aq)+5e^(-) -> Mn^(2+) (aq)+4H_2O(l)` `E^0 = 1.51V`

`Cr_2O_7^(-) (aq)+14H^(+) (aq) +6e^(-) -> 2Cr^(3+)(aq) +7H_2O(l)` `E^0 = 1.38V`

`Fe^(3+)(aq)+e^(-) -> Fe^(2+) (aq)` `E^0 = 0.77V`

`Cl_2(g)+2e^(-) -> 2Cl^(-) (aq)` `E^0 = 1.40V`

Identify the only INCORRECT statement regarding the quantitative estimation of aqueous `Fe(NO_3)_2`
JEE 2002 Prelims
A

`Mn_4^(-)` can be used in aqueous `HCl`

B

`Cr_2O_7^(2-)` can be used in aqueous `HCl`

C

`Mn_4^(-)` can be used in aqueous `H_2SO_4`

D

`Cr_2O_7^(2-)` can be used in aqueous `H_2SO_4`

HINT


Solution
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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