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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 · Q108 of 120

Geo-Scientist Prelims 2025 Chemistry Q108: The number of potential tertiary carbocations as reactive…

QuestionOrganic / biomimetic polyene cyclisation

The number of potential tertiary carbocations as reactive intermediates likely to be formed in the mechanism of the following reaction are :

UPSC Combined Geo-Scientist Prelims 2025 Paper II (Chemistry), Q108: figure printed with the question
  1. (a) Three
  2. (b) Four
  3. (c) Five
  4. (d) Six

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