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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 · Q113 of 120

Geo-Scientist Prelims 2026 Chemistry Q113: The number of sp³ and sp² carbons, respectively, present in the…

QuestionOrganic / Meisenheimer complex

The number of sp³ and sp² carbons, respectively, present in the Meisenheimer complex, formed in the following reaction are 2,4,6-Trinitroanisole → (NaOEt) Meisenheimer complex (NaC₉H₁₀N₃O₈)

  1. (a) Three and six
  2. (b) Four and five
  3. (c) Five and four
  4. (d) Six and three

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