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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 · Q84 of 120

Geo-Scientist Prelims 2026 Chemistry Q84: Which one of the following compounds can be most readily converted…

QuestionOrganic / free radical stability

Which one of the following compounds can be most readily converted into carbon free radical ?

UPSC Combined Geo-Scientist Prelims 2026 Paper II (Chemistry), Q84: figure printed with the question
  1. (a) I (benzene)
  2. (b) II (HC≡CH, ethyne)
  3. (c) III (H₂C=CH₂, ethene)
  4. (d) IV (H₂C=CH–CH₃, propene)

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