Chemistry - Electrochemistry Question with Solution | TestHub

The standard reduction potentials for ${\mathrm{Zn}}^{2+}/\mathrm{Zn},{\mathrm{Ni}}^{2+}/\mathrm{Ni}$, and ${\mathrm{Fe}}^{2+}/\mathrm{Fe}$ are $-0.76,-0.23$ and $-0.44\mathrm{V}$ respectively. The reaction $\mathrm{X}+{\mathrm{Y}}^{2+}\to {\mathrm{X}}^{2+}+\mathrm{Y}$ will be spontaneous when: