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.
