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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 · 2025 · Paper I, General Studies · Q50 of 120

Geo-Scientist Prelims 2025 General Studies Q50: Among the following, which one is the least in percentage by volume…

QuestionClimatology / composition of atmosphere

Among the following, which one is the least in percentage by volume in the atmosphere?

  1. (a) Hydrogen
  2. (b) Argon
  3. (c) Helium
  4. (d) Neon

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