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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 · Q110 of 120

Geo-Scientist Prelims 2026 Chemistry Q110: Consider the following statements :

QuestionOrganic / SNAr reactivity

Consider the following statements :

  1. 4-Chloro-3-nitroacetophenone reacts with sodium methoxide in methanol slower than 4-chloro-3-nitrotoluene
  2. 4-Chloro-3-nitroacetophenone reacts with sodium methoxide in methanol faster than 4-chloro-3-nitrotoluene
  3. 1-Bromo-2,4-dinitrobenzene reacts with sodium methoxide in methanol faster than 1,4-dibromo-2-nitrobenzene
  4. 1-Bromo-2,4-dinitrobenzene reacts with sodium methoxide in methanol slower than 1,4-dibromo-2-nitrobenzene

Which of the statements given above are correct ?

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

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