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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 · 2025 · Paper II, Chemistry · Q2 of 120

Geo-Scientist Prelims 2025 Chemistry Q2: The correct order of penetrating ability of atomic orbitals is :

QuestionAtomic structure / penetration and shielding

The correct order of penetrating ability of atomic orbitals is :

  1. (a) 4s > 4p > 4d > 4f
  2. (b) 4f > 4d > 4p > 4s
  3. (c) 4p > 4s > 4d > 4f
  4. (d) 4d > 4p > 4s > 4f

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