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UPSC Combined Geo-Scientist

Chemist

  • 3 descriptive papers
  • 200 marks each
  • 3 h per paper

Mains Paper I covers inorganic chemistry.

UPSC Combined Geo-Scientist, Mains · 2016 · Mains Paper I

Q10(b). Lanthanide configurations and oxidation states

Question

Explain the configuration and oxidation states of ‘lanthanides’.

Answer in brief

Lanthanides involve progressive filling of 4f orbitals; +3 is the dominant oxidation state, with selected stable +2 and +4 states.

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CoversLanthanide configurationsoxidation statesf-block chemistry

All parts of Question 10