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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 · Q109 of 120

Geo-Scientist Prelims 2026 Chemistry Q109: The major product formed in the following reaction is

QuestionOrganic / Lewis-acid epoxide opening, intramolecular Friedel–Crafts

The major product formed in the following reaction is

UPSC Combined Geo-Scientist Prelims 2026 Paper II (Chemistry), Q109: figure printed with the question
UPSC Combined Geo-Scientist Prelims 2026 Paper II (Chemistry), Q109: answer options as printed
  1. (a) 6,7,8,9-Tetrahydro-5H-benzo[7]annulen-5-ol (benzosuberanol, OH on the benzylic carbon)
  2. (b) 6,7-Dihydro-5H-benzo[7]annulene (benzosuberene)
  3. (c) 6,7,8,9-Tetrahydro-5H-benzo[7]annulene (benzosuberane)
  4. (d) (1,2,3,4-Tetrahydronaphthalen-1-yl)methanol

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