Which one of the following statements related to lanthanons is incorrect ?

  • Ce (+4) solutions are widely used as oxidizing agent in volumetric analysis.
  • Europium shows +2 oxidation state.
  • The basicity decreases as the ionic radius decreases from Pr to Lu
  • All are correct
  • Explanation:

    Ce+4 is strong oxidising agent and easily convert into Ce+3 Eu+2 exist and behave as reducing agent lanthanons are much more reactive than aluminum. Ln(OH)3 are basic in nature and as ionic radius decrease, basic nature decreases from Ce to Lu.

Which one of the following statements related to lanthanons is incorrect ?
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