When  a lead storage battery is discharged then

  • Option 1)

    SO_2   is evolved

  • Option 2)

    Lead is formed

  • Option 3)

    Lead sulphate is consumed

  • Option 4)

    Sulphuric acid is consumed

 

Answers (3)

As we learnt in 

Secondary Battery -

These cells can be recharged and can be used again and again e.g. lead storage battery, Nickel - cadmium storage cell.

-

 

 The reaction takes place as follows:

Pb\left ( s \right )+SO_{4}^{2-}\rightarrow PbSO_{4}+2e^{-}\, \, \left ( Anode \right )

PbO_{2}\left ( s \right )+4H^{+}\left ( aq \right )+SO_{4}^{2-}(aq)\rightarrow PbSO_{4}(s)+H_{2}O\left ( l \right )\, \, \left ( Cathode \right )

Pb\left ( s \right )+PbO_{2}+4H^{+}\left ( aq \right )+SO_{4}^{2-}(aq)\rightarrow 2PbSO_{4}(s)+2H_{2}O(l)

Clearly sulphuric acid is consumed while discharge

\therefore Solution is 4


Option 1)

SO_2   is evolved

Incorrect

Option 2)

Lead is formed

Incorrect

Option 3)

Lead sulphate is consumed

Incorrect

Option 4)

Sulphuric acid is consumed

Correct

4

 

Answer 4

 

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