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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 · Q95 of 120

Geo-Scientist Prelims 2026 Chemistry Q95: Consider the following statements about the reactivity of compounds…

QuestionOrganic / steric acceleration and α-sulfonyl effect

Consider the following statements about the reactivity of compounds I-IV : where OPNB is p-nitrobenzoate

  1. Compound I undergoes solvolysis in aqueous acetone slower than II
  2. Compound I undergoes solvolysis in aqueous acetone faster than II
  3. Compound III reacts with KI slower than IV
  4. Compound III reacts with KI faster than IV
UPSC Combined Geo-Scientist Prelims 2026 Paper II (Chemistry), Q95: figure printed with the question

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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