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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 · Q92 of 120

Geo-Scientist Prelims 2026 Chemistry Q92: The number of methyl groups at the axial and equatorial positions,…

QuestionStereochemistry / thiane formation and conformation

The number of methyl groups at the axial and equatorial positions, respectively in the most stable conformation of the major product formed in the following reaction are

UPSC Combined Geo-Scientist Prelims 2026 Paper II (Chemistry), Q92: figure printed with the question
  1. (a) Three and one
  2. (b) Two and two
  3. (c) One and three
  4. (d) Zero and four

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