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On charging the lead storage battery, the oxidation state of lead changes from x₁ to y₁ at the anode and from x₂ to y₂ at the cathode. The values of x₁, y₁, x₂, y₂ are respectively :

Options

  1. A+4,+2,0,+2
  2. B+2,0,+2,+4
  3. C0,+2,+4,+2
  4. D+2,0,0,+4

Correct answer

B. +2,0,+2,+4

Step-by-step solution

For charging of lead storage battery cell reaction is 2 PbSO ₄( ~s )+2 H ₂ O ( l ) Pb ( s )+ PbO ₂( ~s )+2 H ₂ SO ₄( aq ) At anode PbSO ₄ reduced back to Pb and at cathode PbSO ₄ oxidised back to PbO ₂ . aligned & x ₁=+2, y ₁=0 & x ₂=+2, y ₂=4 aligned

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