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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 · 2023 · Paper II, Chemistry · Q99 of 120

Geo-Scientist Prelims 2023 Chemistry Q99: Consider the following bases :

QuestionOrganic / E2 regioselectivity

Consider the following bases :

  1. EtO⁻
  2. Et₃CO⁻
  3. Me₃CO⁻
  4. Me₂(Et)CO⁻
UPSC Combined Geo-Scientist Prelims 2023 Paper II (Chemistry), Q99: figure printed with the question

The reactivity order of bases for the formation of Zaitsev’s product in the following reaction is :

  1. (a) 1 > 3 > 4 > 2
  2. (b) 4 > 2 > 3 > 1
  3. (c) 2 > 4 > 3 > 1
  4. (d) 1 > 3 > 2 > 4

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