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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 · 2025 · Paper II, Chemistry · Q88 of 120

Geo-Scientist Prelims 2025 Chemistry Q88: The absolute configurations of chiral centres in the product formed…

QuestionStereochemistry / CIP priority change

The absolute configurations of chiral centres in the product formed in the following reaction is :
(2R, 3R) — HOCH₂CHOHCHOHCH₂OH + HBr ⟶ HOCH₂CHOHCHOHCH₂Br

  1. (a) (2R, 3R)
  2. (b) (2S, 3S)
  3. (c) (2R, 3S)
  4. (d) (2S, 3R)

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