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 be spontaneous when :

Answer»

X=NI, Y=Fe
X=Ni , Y=Zn
X=Fe , Y=Zn
X=Zn , Y=Ni

Solution :(d) `X+Y^(2) to X^(2+)+Y`
For REACTION to be spontaneous,`E^(@)` must be positive `E_(Zn^(2+)//Zn)^(@)+E_(Ni^(2+)//Ni)^(@)=0.76+(-0.23)=0.53` (positive).


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