Question
Write major product(s) in the following reaction .



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Column $I ($Property$)$
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Column $II ($Element$)$
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| $(i)$ |
Lanthanoid which shows $+4$ oxidation state
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$(a)$ | $Pm$ |
| $(ii)$ |
Lanthanoid which can show $+2$ oxidation state
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$(b)$ | $Ce$ |
| $(iii)$ |
Radioactive lanthanoid
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$(c)$ | $Lu$ |
| $(iv)$ |
Lanthanoid which has $4f^7$ electronic configuration in $+3$ oxidation state
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$(d)$ | $Eu$ |
| $(v)$ |
Lanthanoid which has $4f^{14}$ electronic configuration in $+3$ oxidation state
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$(e)$ | $Gd$ |
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$(f)$ | $Dy$ |
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Column $I$
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Column $II$
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| $i.$ |
Lead storage battery
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$a.$ |
Maximum efficiency.
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| $ii.$ |
Mercury cell
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$b.$ |
Prevented by galvanisation.
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| $iii.$ |
Fuel cell
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$c.$ |
Gives steady potential.
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| $iv.$ |
Rusting
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$d.$ |
$Pb$ is anode, $PbO_2$ is cathode.
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