1.

Mention the factors on which the colour of a transition metal ion depends.

Answer»

The factors on which the colour of transition metal ion depends are as follows :

  • The presence of incompletely filled dorbitals in metal ions. (The compounds with the configuration d° and d’0 are colourless.)
  • The presence of unpaired electrons in d-orbitals. 
  • d → d transitions of electrons due to absorption of radiation in the visible region. 
  • Nature of groups (anions) (or ligands) linked to the metal ion in the compound or a complex. 
  • Type of hybridisation in metal ion in the complex. 
  • Geometry of the complex of the metal ion. 


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