List of top Chemistry Questions on Electrochemical Cells asked in AP EAPCET

Which of the following are the correct statements about lead storage battery? \[ \begin{aligned} \text{I.} \quad & \text{It is a secondary battery.} \\ \text{II.} \quad & \text{In this cell, the cathode is packed with } \mathrm{PbO_2} \text{ and the anode is filled with lead.} \\ \text{III.} \quad & \text{In this type } \mathrm{H_2SO_4} \text{ acts as electrolyte.} \\ \text{IV.} \quad & \text{During use of the battery, concentration of } \mathrm{H_2SO_4} \text{ decreases.} \end{aligned} \] The correct answer is

According to Faraday's first law of electrolysis, the mass of substance deposited ($w$) is proportional to

If \(E^\circ_{MnO_4^-/MnO_2} = x \, V\) and \(E^\circ_{MnO_2/Mn^{2+}} = y \, V\), what is the value of \(E^\circ_{MnO_4^-/Mn^{2+}}\)?

The standard Gibbs energy \(\Delta G^0\) for the electrochemical cell: \[ \text{P(s)} | \text{P}^{3+}(\text{aq}, 0.01\,\text{M}) || \text{Q}^{2+}(\text{aq}, 0.02\,\text{M}) | \text{Q(s)} \] with \(E^0_\text{cell} = 0.2 \, \text{V}\) is: