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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 · Q109 of 120

Geo-Scientist Prelims 2023 Chemistry Q109: Identify the processes labelled as “P”, “Q” and “R” in the…

QuestionOrganic / radical addition energetics (peroxide effect)

Identify the processes labelled as “P”, “Q” and “R” in the following table summarizing energetics of free radical addition of HX (X = Cl, Br or I) to propylene :

UPSC Combined Geo-Scientist Prelims 2023 Paper II (Chemistry), Q109: figure printed with the question
  1. (a) P is Endothermic, Q is Exothermic, and R is Exothermic
  2. (b) P is Exothermic, Q is Exothermic, and R is Exothermic
  3. (c) P is Endothermic, Q is Exothermic, and R is Endothermic
  4. (d) P is Exothermic, Q is Endothermic, and R is Exothermic

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