Question

Using the data given below:
`E_(Cr_(2)O_(7)^(2-)|Cr^(3+))^(@)=1.33V E_(Cl_(2)|Cl^(-))^(@)=1.36V`
`E_(MnO_(4)^(-)|Mn^(2+))^(@)=1.51V E_(Cr^(3+)|Cr)=-0.74V`
Find the most stable ion in its reduced forms
A. `Cl^-`
B. `Cr^(3+)`
C. `Cr`
D. `Mn^(2+)`

Answer 1

Correct Answer - D
`E_(MnO_4^(-)//Mn^(2+))^@` has highest reduction potential hence, `Mn^(2+)` is the most stable reduced species .