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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 · 2022 · Paper II, Chemistry · Q117 of 120

Geo-Scientist Prelims 2022 Chemistry Q117: The major product formed in the following reaction sequence is

QuestionCarbocation rearrangement / pinacol and ring expansion

The major product formed in the following reaction sequence is

UPSC Combined Geo-Scientist Prelims 2022 Paper II (Chemistry), Q117: figure printed with the question
UPSC Combined Geo-Scientist Prelims 2022 Paper II (Chemistry), Q117: answer options as printed
  1. (a) Bicyclo[3.3.0]oct-1(5)-ene (C=C at the ring fusion)
  2. (b) Bicyclo[3.3.0]oct-1-ene (C=C from ring fusion into one ring)
  3. (c) Spiro[3.4]oct-5-ene (C=C next to the spiro carbon)
  4. (d) Spiro[3.4]oct-6-ene

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