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Question

During the charging of lead storage battery, the reaction at anode is represented by:


A
Pb2++SO24PbSO4
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B
PbSO4+2H2OPbO2+SO24+4H++2e
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C
PbPb2++2e
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D
Pb2++2ePb
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Solution

The correct option is D $$PbSO_4 + 2 H_2O \rightarrow PbO_2 + SO_4^{2-} + 4 H^+ + 2e$$
During the charging process:

At Anode oxidation takes place.
$$PbSO_4 + 2H_2O \rightarrow PbO_2 + SO_4^{2-} + 4H^+ +2e^-$$

Net reaction: 
$$2PbSO_4 + 2H_2O   \rightarrow  Pb + PbO_2 + 2H_2SO_4$$ 
 

Chemistry

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