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UPSC Combined Geo-Scientist

Chemist

  • 2 objective papers
  • 120 questions each
  • 2 h per paper
  • 100 + 300 marks

Prelims Paper II covers chemistry.

UPSC Combined Geo-Scientist, Prelims · 2023 · Paper II, Chemistry · Q10 of 120

Geo-Scientist Prelims 2023 Chemistry Q10: The effective nuclear charge (Z_eff) at the periphery of O²⁻ ion is :

QuestionAtomic structure / Slater's rules

The effective nuclear charge (Z_eff) at the periphery of O²⁻ ion is :

  1. (a) 3·85
  2. (b) 3·50
  3. (c) 3·80
  4. (d) 3·45

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