Chemistry
JAMB 2008
In recharging a lead-acid accumulator, the reaction at the cathode can be represented as
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A.
Pb2+(aq) + SO2-4(aq) →PbSO4(s)
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B.
Pb2+(aq) + 2e- →Pb(s)
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C.
Pb2+(aq) + 2H2O(l) → PbO2(s) + 4H+(aq) + 4e-
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D.
Pb(s) → Pb2+(aq) + 2e-
Correct Answer: Option B
Explanation
In lead acid ,lead dissociates at the cathode Pb2+(aq) + 2e- →Pb(s)
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