List of top Chemistry Questions on Electrochemical Cells asked in BITSAT

The EMF of the cell Tl|Tl⁺(0.001M)||Cu²+(0.01M)|Cu is 0.83V. The cell EMF can be increased by:

The standard electrode potentials are:
\(E^\circ(\text{Zn}^{2+}/\text{Zn}) = -0.76 \, \text{V}, \quad E^\circ(\text{Cu}^{2+}/\text{Cu}) = +0.34 \, \text{V}\).
The equilibrium constant for the reaction
\(\text{Zn} + \text{Cu}^{2+} \rightleftharpoons \text{Cu} + \text{Zn}^{2+}\)
at \(25^\circ \text{C}\) is of the order of

In the cell reaction \(\text{Cu(s)} + 2\text{Ag}^+(\text{aq}) \rightarrow \text{Cu}^{2+}(\text{aq}) + 2\text{Ag(s)}\), \(E^\circ_{\text{cell}} = 0.46\,\text{V}\). By doubling the concentration of \(\text{Cu}^{2+}\), \(E_{\text{cell}}\) is:

Cu\(^+\) is unstable in solution and undergoes simultaneous oxidation and reduction according to the reaction \(2\text{Cu}^+(\text{aq}) \rightarrow \text{Cu}^{2+}(\text{aq}) + \text{Cu(s)}\). Choose the correct \(E^\circ\) for the above reaction if \(E^\circ_{\text{Cu}^{2+}/\text{Cu}} = +0.34\,\text{V}\) and \(E^\circ_{\text{Cu}^+/\text{Cu}} = +0.15\,\text{V}\).

Which of the following will form the cathode with respect to iron an electrode cell?