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JEE Main levelOne or more correct optionsDifficulty 2 of 3pb212

Select the correct statement(s) arising from the inert pair effect in group 14.

  1. AThe stability of the +4 oxidation state increases from Ge to Pb.
  2. B is more stable than .
  3. CPb(IV) compounds act as oxidising agents.
  4. DGe(IV) compounds are more stable than Ge(II) compounds.

Answer: B, C, D

On descending the group the pair becomes less available for bonding, so the +2 state gains stability and the +4 state loses it. Thus Ge(IV) is preferred, Pb(II) is preferred, and Pb(IV) oxidises. The last statement states the reverse trend and is false.
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