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JEE Advanced levelSingle correct optionDifficulty 3 of 3pb034

Assertion (A): is unstable and decomposes on gentle warming to and . Reason (R): Because of the inert pair effect, the +2 oxidation state is more stable than the +4 state for lead.

  1. ABoth A and R are true and R is the correct explanation of A
  2. BBoth A and R are true but R is not the correct explanation of A
  3. CA is true but R is false
  4. DA is false but R is true

Answer: A

is a redox change in which Pb(IV) is reduced to Pb(II) and chloride is oxidised. It happens because the pair is reluctant to take part in bonding, making Pb(II) more stable. R is true and directly explains A.
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