Electrochemistry

For the cell,

${ }^{\ominus} \mathrm{Zn}_{(\mathrm{s})}\left|\mathrm{Zn}^{+2}(1 \mathrm{M})\right|\left|\mathrm{Ag}^{+1}(1 \mathrm{M})\right| \mathrm{Ag}_{(\mathrm{s})}{ }^{\oplus}$

If concentration of $\mathrm{Zn}^{+2}$ decreases to 0.1 M at 298 K , then emf of cell