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E^(@)(Na^(+)//Na)=-2.71V E^(@)(Mg^(+2)//...

`E^(@)_(Na^(+)//Na)=-2.71V E^(@)_(Mg^(+2)//Mg)=-2.37V`
`E^(@)_(Fe^(+2)//Fe)=-0.44V, E^(@)_(Cr^(+)//Mg)=-0.41V`
Based on this date which is th poorest reducing agent?

A

`Na^(+)`

B

`Mg^(+2)` can be reduced by `H_(2)`

C

`Fe^(+2)`

D

`Cr^(+3)`

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