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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 · Q117 of 120

Geo-Scientist Prelims 2025 Chemistry Q117: The major product formed in the following reaction is :

QuestionOrganic / oxetane ring opening, methyl shift

The major product formed in the following reaction is :

UPSC Combined Geo-Scientist Prelims 2025 Paper II (Chemistry), Q117: figure printed with the question
UPSC Combined Geo-Scientist Prelims 2025 Paper II (Chemistry), Q117: answer options as printed
  1. (a) 2-Phenyl-3,3,4,5,5-pentamethyltetrahydrofuran
  2. (b) 2-Phenyl-3,3,4,4,5-pentamethyltetrahydrofuran
  3. (c) 2-Phenyl-3,4,4,5,5-pentamethyltetrahydrofuran
  4. (d) 2,3,4,4-Tetramethyl-1-phenylpent-2-en-1-ol

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