For Redox Titrations,the Oxidation State of the Analyte May Need

For redox titrations,the oxidation state of the analyte may need adjusting.The analyte can be prereduced with a reducing agent to quantitatively reduce the analyte,with the excess reducing agent eliminated to prevent interference with titration.Which of the reducing agents is paired with INCORRECT elimination chemistry?

A) Stannous chloride in hot HCl is eliminated by the addition of excess HgCl₂,converting stannous cation to stannic cation.
B) Chromous chloride is eliminated by boiling,converting chromium(II) cation to chromium(III) .
C) Sulfur dioxide is expelled by boiling in acid.
D) Hydrogen sulfide is expelled by boiling in base.
E) Excess hydrogen peroxide in acidic solution is eliminated by boiling,converting hydrogen peroxide to water and oxygen gas.

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