Select the incorrect option,when a lead stora | vedclass

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(A) The chemical reactions occurring during the discharge of a lead storage battery are as follows: At the anode: $Pb(s) + SO_4^{2-}(aq) \rightarrow P

Vedclass · Accepted Answer

$SO_2$ is evolved

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(A) The chemical reactions occurring during the discharge of a lead storage battery are as follows: At the anode: $Pb(s) + SO_4^{2-}(aq) \rightarrow PbSO_4(s) + 2e^-$ At the cathode: $PbO_2(s) + SO_4^{2-}(aq) + 4H^+(aq) + 2e^- \rightarrow PbSO_4(s) + 2H_2O(l)$ Overall reaction: $Pb(s) + PbO_2(s) + 2H_2SO_4(aq) \rightarrow 2PbSO_4(s) + 2H_2O(l)$ From the overall reaction,it is clear that: $1$. $PbSO_4$ is produced at both electrodes. $2$. $H_2SO_4$ is consumed. $3$. $H_2O$ is formed. $SO_2$ is not evolved during the discharge process. Therefore,option $A$ is incorrect.

$LIST$-$I$ (Cell)	$LIST$-$II$ (Use/Property/Reaction)
$A$. Leclanche cell	$I$. Converts energy of combustion into electrical energy
$B$. Ni-Cd cell	$II$. Does not involve any ion in solution and is used in hearing aids
$C$. Fuel cell	$III$. Rechargeable
$D$. Mercury cell	$IV$. Reaction at anode $Zn \rightarrow Zn^{2+} + 2e^-$

Select the incorrect option,when a lead storage battery is discharged $-$

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