Question

Li occupies higher position in the electrochemical series of metals as compared to Cu since :

• A. The standard reduction potential of $L{i}^{+}/Li$ is lower than that of $C{u}^{2+}/Cu$
• B. The standard reduction potential of $C{u}^{2+}/Cu$ is lower that that of $Li/Li$
• C. The standard oxidation potential of $Li/L{i}^{+}$ is lower than that of $Cu/C{u}^{2+}$
• D. $Li$ is smaller in size as compared to $Cu$

Answer 1

Answer: (A)

The standard reduction potential of $L{i}^{+}/Li$ is lower than that of $C{u}^{2+}/Cu$

In the electrochemical series, metals are arranged in increasing order of their standard reduction potential. The standard reduction potential of $L{i}^{+}/Li$ and $C{u}^{2+}/Cu$ are $-3.05V$ and $+0.034V$ respectively. Therefore, $Li$ occupies higher position in series as compared to $Cu$.