1.

The standard reduction potential for `Zn^(2+)//Zn, Ni^(2+)//Ni` and `Fe^(2+)//Fe` are -0.76,-0.23 and `-0.44" V "` respectively. The reaction `X+Y^(2+) to X^(2)+Y` will have more negative `DeltaG` value when X and Y areA. X=Ni, Y=FeB. X=Ni , Y=ZnC. X=Fe , Y=ZnD. X=Zn , Y=Ni

Answer» Correct Answer - D
(d) `X+Y^(2+) to X^(2+)+Y`
`DeltaG=-nFE_(cell)`.
Greater the value of `E_(cell)`.more will be the value of `DeltaG`. For this, the difference between `E^(@)` values of `X^(2+)` and `Y^(2+)` must be maximum. This means that X=Zn and Y=Ni.


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