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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 · Q90 of 120

Geo-Scientist Prelims 2026 Chemistry Q90: Which one among the following pairs is NOT correctly matched ?

QuestionOrganic / substitution vs elimination

Which one among the following pairs is NOT correctly matched ?

  1. (a) Cyclohexyl bromide reacts with sodium ethoxide in ethanol : E2
  2. (b) tert-Butyl bromide reacts with sodium ethoxide in ethanol : SN1
  3. (c) The strength of the nucleophile is important in determining rate : SN2
  4. (d) Rearrangements are possible in product formation : E1

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