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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 · 2025 · Paper II, Chemistry · Q114 of 120

Geo-Scientist Prelims 2025 Chemistry Q114: The major product [X] formed in the following reaction sequence is :

QuestionOrganic / aryne cyclisation (indole synthesis)

The major product [X] formed in the following reaction sequence is :

UPSC Combined Geo-Scientist Prelims 2025 Paper II (Chemistry), Q114: figure printed with the question
UPSC Combined Geo-Scientist Prelims 2025 Paper II (Chemistry), Q114: answer options as printed
  1. (a) 6-Methyl-2,3,4,9-tetrahydro-1H-carbazole
  2. (b) 7-Bromo-6-methyl-2,3,4,9-tetrahydro-1H-carbazole
  3. (c) 5-Bromo-6-methyl-2,3,4,9-tetrahydro-1H-carbazole
  4. (d) 7-Bromo-5-methyl-2,3,4,9-tetrahydro-1H-carbazole

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