Q25 / 160 · TS EAMCET 2020 (10 Sep Shift 1) · Chemistry

Silver electrode acts as anode and $E_{\text {cell }}^{\circ}$ is $-0.34 \mathrm{~V}$

  • A
    Copper electrode acts as anode and $E_{\text {cell }}^{\circ}$ is $+0.46 \mathrm{~V}$
  • Correct answer
    B
    Copper electrode acts as anode and $E_{\text {cell }}^{\circ}$ is $+0.46 \mathrm{~V}$
  • C
    Silver electrode acts as a cathode and $E_{\text {cell }}^{\circ}$ is $-0.34 \mathrm{~V}$.
  • D
    Copper electrode acts as cathode and $E_{\text {cell }}^{\circ}$ is $+0.46 \mathrm{~V}$

Solution

Electrode having higher reduction potential has to be cathode. Hence, silver electrode act as a cathode. Because reduction potential of silver electrode $\left(E^{\circ}\right)$ is $+80 \mathrm{~V}$. Which is more than given reduction potential of $\mathrm{Cu}(+34 \mathrm{~V})$. Hence, $E_{\text {cell }}^{\circ}$ will determine as: $\begin{aligned} E_{\text {cell }}^{\circ} & =E_{(\text {Reduction }) \text { cathode }}^{\circ}-E_{(\text {Reduction) anode }}^{\circ} \\ & =+80-(+0.34)=+0.46 \mathrm{~V} \end{aligned}$

Hence, the correct answer is option: 'B'.

Relevant Questions