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UPSC Combined Geo-Scientist

Chemist

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

Prelims Paper I covers general studies.

UPSC Combined Geo-Scientist, Prelims · 2024 · Paper I, General Studies · Q4 of 120

Geo-Scientist Prelims 2024 General Studies Q4: Which one among the following is the correct ground state…

QuestionAtomic structure / electronic configuration

Which one among the following is the correct ground state electronic configuration of Cr atom ?

  1. (a) 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁴ 4s²
  2. (b) 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁵ 4s¹
  3. (c) 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁶ 4s⁰
  4. (d) 1s² 2s² 2p⁶ 3s² 3p⁶ 3d³ 4s²

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