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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 · 2026 · Paper II, Chemistry · Q9 of 120

Geo-Scientist Prelims 2026 Chemistry Q9: Which one of the following is the correct value of the effective…

QuestionAtomic structure / Slater's rules

Which one of the following is the correct value of the effective nuclear charge (Z_eff) for the 3d electron of chromium ?

  1. (a) 4·95
  2. (b) 11·0
  3. (c) 4·60
  4. (d) 11·35

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