The E.M.F. of the following cell \( \mathrm{Fe}(\mathrm{s})\left|\mathrm{Fe}^{2+}(0.1 \mathrm{M}...

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The E.M.F. of the following cell \( \mathrm{Fe}(\mathrm{s})\left|\mathrm{Fe}^{2+}(0.1 \mathrm{M}) \| \mathrm{Cu}^{2+}(0.01 \mathrm{M})\right| \mathrm{Cu} \) is found to be equal to \( 0.75 \mathrm{~V} \). The E.M.F. of the cell can be increased by
(a) Diluting \( \mathrm{Fe}^{2+} \) solution
(b) Diluting \( \mathrm{Cu}^{2+} \) solution
(c) Increasing the conc. of \( \mathrm{Fe}^{2+} \) ions
(d) Increasing the conc. of \( \mathrm{Cu}^{2+} \) ions
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