Redox Reactions And Electrochemistry Ques 20

Question: When lead storage battery is charged [MP PET 1993; MP PMT 2000]

Options:

A) Lead dioxide dissolves

B) Sulphuric acid is regenerated

C) The lead electrode becomes coated with lead sulphate

D) The amount of sulphuric acid decreases

Show Answer

Answer:

Correct Answer: B

Solution:

During charging of a lead storage battery, the reaction at the anode and cathode are Anode: $ PbSO_4+2{e^{-}}\to Pb+SO_4^{2-} $ Cathode: $ PbSO_4+2H_2O\to PbO_2+4{H^{+}}+SO_4^{2-}+2{e^{-}} $ In both the reactions $ H_2SO_4 $ is regenerated.



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