Question

Consider the following perhalate ions in acidic medium `ClO_(4)^(-)(I),BrO_(4)^(-)(II),IO_(4)^(-)(III)`
Arrange these in the decreasing order of oxidizing power
A. `IgtIIgtIII`
B. `IgtIIIgtII`
C. `IIgtIgtIII`
D. `IIgtIIIgtI`

Answer 1

Correct Answer - D
Standared reduction potential (in volts) of the perhalantions are given as below.
`{:(CiO_(4)^(-)+2H^(+)+2e^(-)toClO_(3)^(-)+H_(2)O,E^(@)=+1.19 V),(BrO_(4)^(-)+2H^(+)+2e^(-)toBrO_(3)^(-)+H_(2)O,E^(@)=+1.74 V),(IO_(4)^(-)+2H^(+)+2e^(-)toIO_(3)^(-)+H_(2)O,E^(@)=+1.65 V):}`