A) \[Pb+SO_{4}^{2-}\xrightarrow{{}}PbS{{O}_{4}}+2{{e}^{-}}\]
B) \[Pb+Pb{{O}_{2}}+{{H}_{2}}S{{O}_{4}}\] \[\xrightarrow{{}}2PbS{{O}_{4}}+2{{H}_{2}}O\]
C) \[PbS{{O}_{4}}+2{{e}^{-}}\xrightarrow[{}]{{}}pb+SO_{4}^{2-}\]
D) \[Pb{{O}_{2}}+4{{H}^{+}}+SO_{4}^{2-}+2{{e}^{-}}\] \[\xrightarrow[{}]{{}}pbS{{O}_{4}}+2{{H}_{2}}O\]
Correct Answer: D
Solution :
In lead storage battery,\[{{H}_{2}}S{{O}_{4}}\]used as electrolyte. Reaction at anode \[Pb(s)+SO_{4}^{2-}(aq)\xrightarrow{{}}PbS{{O}_{4}}(s)+2{{e}^{-}}\] Reaction at cathode \[Pb{{O}_{2}}(s)+4{{H}^{+}}(aq)+SO_{4}^{2-}(aq)+2{{e}^{-}}\xrightarrow{{}}\] \[PbS{{O}_{4}}(s)+2{{H}_{2}}O(l)\]
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