CUET · CHEMISTRY · PYQ PAPER 2023
The reaction occurring at the cathode during discharging of a lead-storage battery is:
- A \(Pb(s) + SO_4^{2-}(aq) \rightarrow PbSO_4(s) + 2e^-\)
- B \(PbO_2(s) + SO_4^{2-}(aq) + 4H^+(aq) + 2e^- \rightarrow PbSO_4(s) + 2H_2O(l)\)
- C \(PbSO_4(s) + 2e^- \rightarrow Pb(s) + SO_4^{2-}(aq)\)
- D \(PbSO_4(s) + 2H_2O(l) \rightarrow PbO_2(s) + SO_4^{2-}(aq) + 4H^+(aq) + 2e^-\)
Answer & Solution
Correct Answer
(B) \(PbO_2(s) + SO_4^{2-}(aq) + 4H^+(aq) + 2e^- \rightarrow PbSO_4(s) + 2H_2O(l)\)
Step-by-step Solution
Detailed explanation
\(PbO_2(s) + SO_4^{2-}(aq) + 4H^+(aq) + 2e^- \rightarrow PbSO_4(s) + 2H_2O(l)\)
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