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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 · 2022 · Paper I, General Studies · Q15 of 120

Geo-Scientist Prelims 2022 General Studies Q15: A species that is not isoelectronic with ³⁵₁₇Cl⁻ is

QuestionAtomic structure / isoelectronic species

A species that is not isoelectronic with ³⁵₁₇Cl⁻ is

  1. (a) ³¹₁₅P³⁻
  2. (b) ³²₁₆S²⁻
  3. (c) ⁴⁰₁₈Ar²⁺
  4. (d) ³⁹₁₉K⁺

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