Among the following metals, the strongest reducing agent is

Options

A. `Mn^(2+)`
B. `Cr^(3+)`
C. `Cl^(-)`
D. `Zn`

Answer

D

Explanation

For strongest reducing agent `E_(OP)^(o)` should be maximum
`_(OPCr//Cr^(+3))^(o)=0.74V`
whereas
`E_(OPMn^(2+)//MnO_(4)^(-))^(o)=-1.5V`
`E_(OPCr^(3+)//Cr_(2)O_(7)^(-2))^(o)=-1.33V" "E_(OPCl^(-)//Cl_(2))=-1.36V`