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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 · Q120 of 120

Geo-Scientist Prelims 2023 Chemistry Q120: Consider the following solvolysis reaction : (where, Z is H or p-Cl…

QuestionOrganic / phenonium ion (aryl participation)

Consider the following solvolysis reaction : (where, Z is H or p-Cl or p-Me or p-OMe)

UPSC Combined Geo-Scientist Prelims 2023 Paper II (Chemistry), Q120: figure printed with the question

The extent of neighbouring group participation of phenyl group (from lower to higher) follows which one of the following order ?

  1. (a) H < p-Cl < p-OMe < p-Me
  2. (b) p-OMe < p-Cl < p-Me < H
  3. (c) p-Cl < p-Me < H < p-OMe
  4. (d) p-Cl < H < p-Me < p-OMe

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