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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 · 2023 · Paper II, Chemistry · Q92 of 120

Geo-Scientist Prelims 2023 Chemistry Q92: The most stable conformer of 1,2-difluoroethane in the gas phase is :

QuestionConformational analysis / gauche effect

The most stable conformer of 1,2-difluoroethane in the gas phase is :

UPSC Combined Geo-Scientist Prelims 2023 Paper II (Chemistry), Q92: answer options as printed
  1. (a) Staggered anti (F–C–C–F dihedral 180°)
  2. (b) Staggered gauche (F–C–C–F dihedral 60°)
  3. (c) Eclipsed (F–C–C–F dihedral 120°)
  4. (d) Eclipsed (F–C–C–F dihedral 0°)

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