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ChemistryNEET 2021Lanthanoids and actinoids

The d- and f-Block Elements

The incorrect statement among the following is:

  1. A.Actinoid contraction is greater from element to element than lanthanoid contraction
  2. B.Most of the trivalent lanthanoid ions are colourless in the solid state✓
  3. C.Lanthanoids are good conductors of heat and electricity
  4. D.Actinoids are highly reactive metals, especially when finely divided

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