The electrode potential

Question:

The electrode potential of $\mathrm{M}^{2+} / \mathrm{M}$ of $3 \mathrm{~d}$-series elements shows positive value of:

  1. $\mathrm{Zn}$

  2. $\mathrm{Fe}$

  3. $\mathrm{Co}$

  4. $\mathrm{Cu}$


Correct Option: , 4

Solution:

Only copper shows positive value for electrode

potential of $\mathrm{M}^{2+} / \mathrm{M}$ of $3 \mathrm{~d}$-series elements.

$\mathrm{E}^{\ominus} / \mathrm{V}_{\left(\mathrm{Cu}^{2+} / \mathrm{Cu}\right)}:+0.34$

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