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KCET2025Chemistryd and f Block Elements

A member of the Lanthanoid series which is well known to exhibit +4 oxidation state is

Options

  1. ASamarium
  2. BEuropium
  3. CErbium
  4. DCerium

Correct answer

D. Cerium

Step-by-step solution

Ce :[ Xe ] 4 f ^1 5 ~d ^1 6 ~s ^2 Ce ⁺⁴:[ Xe ] 4 f ^ 5 ~d ^ 6 ~s ^ Since Ce ⁺⁴ has stable noble gas configuration, it is well known to show +4 oxidation sate.

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