List of top Chemistry Questions on Electrochemistry asked in AP EAPCET

Which of the following statements are correct about a dry cell?

• [(I)] It is also known as Leclanche cell.

• [(II)] Electrolyte is a moist paste of \(NH_4Cl\) and \(ZnCl_2\).

• [(III)] Reaction at cathode is \[ MnO_2 + NH_4^+ + e^- \rightarrow MnO(OH) + NH_3 \]

• [(IV)] It can be charged.

The cell potential $E_{cell}$ for the following cell is:
\[ A(s) | A^+(aq, 0.1M) || B^{2+}(aq, 0.01M) | B(s) \] Given: \[ E^\circ_{A^+/A} = 1V,\quad E^\circ_{B^{2+}/B} = 3V \]

The standard Gibbs energy change for Daniell cell reaction is \[ Zn(s)+Cu^{2+}(aq)\rightarrow Zn^{2+}(aq)+Cu(s) \] \[ E^\circ_{\text{cell}}=1.1\ V \] Find the standard Gibbs energy change \((\Delta G^\circ)\).

What is the molar conductivity of \(CH_3CO_2H\) at infinite dilution?
Given that, \[ \lambda_m^\circ\left((CH_3CO_2)_2Ba\right)=x_1\ S\ cm^2\ mol^{-1} \] \[ \lambda_m^\circ(BaCl_2)=x_2\ S\ cm^2\ mol^{-1} \] \[ \lambda_m^\circ(HCl)=x_3\ S\ cm^2\ mol^{-1} \]

On electrolysis of aqueous solution of sodium butanoate gives a hydrocarbon. The number of carbon atoms present in the hydrocarbon are:

\(\Delta G^\circ\) value for the following oxidation process is:
\[ A \rightarrow A^{3+} + 3e^- \] Given: \[ A \rightarrow A^+ + e^- \quad \Delta G^\circ = 1J \] \[ A^+ \rightarrow A^{3+} + 2e^- \quad \Delta G^\circ = 3J \]

In which of the following ions are correctly arranged with respect to their mobilities in aqueous solution?

What is the total charge of one mole of electrons?