Question

Given `E_("Cr_(2)O_(7)^(2-)//Cr^(3+))^(@)=1.33V,E_(MnO_(4)^(-)//Mn^(2+))^(@)=1.51V`
Among the following, the strongest reducing agent is `E_(Cr^(3+)//Cr)^(@)=-0.74V^(x),E_(MnO_(4)^(-)//Mn^(2+))^(@)=1.51V`
`E_(Cr_(2)O_(7)^(2-)//Cr^(3+))^(@)=1.33V,E_(Cl//Cl^(-))^(@)=1.36V`
Based on the data given above strongest oxidising agent will be
A. `Cl^(-)`
B. `Mn^(2+)`
C. `MnO_(4)^(-)`
D. `Cr^(3+)`

Answer 1

Higher the positive value of standard reduction potential of metal ion higher will be its oxidising capacity.
Since `E_(MnO_(4)^(-))^(@)` has value equal to 1.51V hence it is the strongest oxidsiing agent.