MCQ
When lead storage battery is charged
- A$Pb{O_2}$ is dissolved
- B$PbS{O_4}$ is deposited on lead electrode
- ✓${H_2}S{O_4}$ is regenerated
- DLead is deposited on lead electrode
✓
Answer
Correct option: C.
${H_2}S{O_4}$ is regenerated
c
Net cell reaction during discharge:-
Net cell reaction during discharge:-
$P b_{(s)}+P b O_{2(s)}+2 H_{2} S O_{4(a q)} \rightarrow 2 P b S O_{4(s)}+2 H_{2} O_{(l)}$
$\rightarrow$ During discharge, $H_{2} S O_{4}$ is consumed and its density decreases.
$\rightarrow$ Fully charged cell gives a potential of about $2 V$. When the cell potential reduces to about $1.8 V$ it should be recharged.
Net cell reaction during recharge:-
$2 P b S O_{4(s)}+2 H_{2} O_{(l)} \rightarrow P b_{(s)}+P b O_{2(s)}+2 H_{2} S O_{4(a q)}$
$\rightarrow$ The concentration of $H_{2} S O_{4}$ increases as it is generated.
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