1.

Standard reduction potential of Zn^(2+)//Zn,Ni^(2+)//Ni and Fe^(2+)//Fe are -0.76 V, -0.23 V and -0.44 V respectively. So in which condition reaction X+Y^(2+) to Y+X^(2+) would be spontaneous ?

Answer»

`X=Ni,Y=Fe`
`X=Ni,Y=ZN`
`X=Fe,Y=Zn`
`X=Zn,Y=Ni`

SOLUTION :`Zn_((S))+Ni_((AQ))^(2+) to Zn_(Ni^(2+)//Ni)^(@)-E_(Zn^(2+)//Zn)^(@)`
`=-0.23-(-0.76)=+0.52V`.


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