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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 · Q99 of 120

Geo-Scientist Prelims 2026 Chemistry Q99: Which one of the following alkyl bromides will give exclusively one…

QuestionOrganic / E2 regiochemistry

Which one of the following alkyl bromides will give exclusively one terminal mono-substituted alkene upon dehydrobromination by an E2 process ?

  1. (a) 3-bromo-3-methylpentane
  2. (b) 3-bromo-2-methylpentane
  3. (c) 2-bromo-2,3-dimethylbutane
  4. (d) 2-bromo-3,3-dimethylbutane

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