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Chemistry

NEET ChemistryClass 12The lanthanoidsMediumStatement based

Question 8 of 10

Most lanthanoids prefer the +3 state, but a few show +2 or +4. Which of the statements below are correct?

  • Statement I: The principal oxidation state of the lanthanoids is +3.
  • Statement II: Ce⁴⁺ in aqueous solution is a strong oxidising agent.
  • Statement III: The lanthanoid contraction arises because 4f electrons shield one another poorly from the nuclear charge.
  • Statement IV: Eu²⁺ is a strong oxidising agent.

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