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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 · Q115 of 120

Geo-Scientist Prelims 2023 Chemistry Q115: Which one of the following compounds will not be formed in the…

QuestionOrganic / benzyne mechanism

Which one of the following compounds will not be formed in the given reaction ? *indicates a ¹³C label

UPSC Combined Geo-Scientist Prelims 2023 Paper II (Chemistry), Q115: figure printed with the question
UPSC Combined Geo-Scientist Prelims 2023 Paper II (Chemistry), Q115: answer options as printed
  1. (a) Aniline with ¹³C meta to NH₂
  2. (b) Aniline with ¹³C ortho to NH₂
  3. (c) Aniline with ¹³C para to NH₂
  4. (d) Aniline with ¹³C at the carbon bearing NH₂ (ipso)

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Topic notes: reactive intermediates (carbocations, carbanions, radicals, carbenes, nitrenes, benzyne), with every Civil Services, IFoS and Geo-Scientist PYQ →

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