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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 · 2021 · Paper II, Chemistry · Q117 of 120

Geo-Scientist Prelims 2021 Chemistry Q117: Consider the following reaction: The major product ‘P’ of…

QuestionRearrangements / Wagner–Meerwein (terpenes)

Consider the following reaction:
The major product ‘P’ of Wagner-Meerwein rearrangement is:

UPSC Combined Geo-Scientist Prelims 2021 Paper II (Chemistry), Q117: figure printed with the question
UPSC Combined Geo-Scientist Prelims 2021 Paper II (Chemistry), Q117: answer options as printed
  1. (a) Chloride that keeps the bridged cyclobutane (pinane-type) skeleton, Cl on the bridge carbon next to the gem-dimethyl carbon
  2. (b) Bornyl chloride (2-chloro-1,7,7-trimethylbicyclo[2.2.1]heptane)
  3. (c) Chloride that keeps the pinane skeleton, Cl on the ring carbon next to the methyl-bearing carbon
  4. (d) Bicyclo[2.2.1]heptyl chloride with a bridgehead methyl and Cl on a methyl-bearing (tertiary) ring carbon, unsubstituted C7 bridge

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