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Four successive members of first row transition element are listed belw. Which one of them is expected to have highest `E_((M^(3+))/(M^(2+))^(ɵ)` value?
A. `Cr(Z=24)`
B. `Mn(Z=25)`
C. `Fe(Z=26)`
D. `Co(Z=27)`

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Best answer
Correct Answer - D
`(d) E_(Cr^(3+)//Cr^(2+))^(@)=-0.41VE^(@)`
E_(Fe^(3+)//Fe^(2+))^(@)=+0.77V,E_(Mn^(3+)//Mn^(2+))^(@)=+1.57V`
E_(Co^(3+)//Co^(2+))^(@)=+1.97V`

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