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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 · Q100 of 120

Geo-Scientist Prelims 2026 Chemistry Q100: The mechanism of the following reaction involves the sequential…

QuestionOrganic / carbocation rearrangement (ring expansion)

The mechanism of the following reaction involves the sequential conversion of

UPSC Combined Geo-Scientist Prelims 2026 Paper II (Chemistry), Q100: figure printed with the question
  1. (a) 1° carbocation to 3° carbocation to 3° carbocation
  2. (b) 1° carbocation to 2° carbocation to 2° carbocation
  3. (c) 1° carbocation to 2° carbocation to 3° carbocation
  4. (d) 1° carbocation to 3° carbocation to 2° carbocation

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