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Question -

  1. Rationalise the given statements and give chemicalreactions:
  2. Lead (II) chloride reacts with Cl2  togive PbCl4 .
  3. Lead (IV) chloride is highly unstable towards heat.
  4. Lead is known not to form an iodide Pbl4.



Answer -

·        PbCl2  + Cl2 ———>PbCl4.
This is because Pb can show +2 oxidation state more easily than +4 due to inertpair effect.
heat

·        PbCl4 ———> PbCl2 +Cl2
Because Pb2+ is more stable than Pb4+ due to inert pair effect.

·        Pbl4 does not existbecause I- ion being a powerful reducing agent reduces Pb4+ ionto Pb2+ ion in solution.

·        Pb4+ + 2I– ——->Pb2+ + l2
Pb(IV)                      Pb(II)

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