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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 · Q83 of 120

Geo-Scientist Prelims 2025 Chemistry Q83: Consider the following statements :

QuestionOrganic / alkene reactivity and stability

Consider the following statements :

  1. 2-Chloroprop-1-ene is more susceptible to attack by electrophiles than 3-chloroprop-1-ene.
  2. Ethyl but-3-enoate is more susceptible to electrophilic attack than ethyl(E)-but-2-enoate.
  3. Bicyclo[2.2.1]hept-2-ene is more stable than bicyclo[2.2.1]hept-1-ene.
  4. 2,3-Dimethyl-2-hexene has lesser heat of hydrogenation than 4,5-dimethyl-2-hexene.

How many of the above statement(s) is/are correct ?

  1. (a) One
  2. (b) Two
  3. (c) Three
  4. (d) Four

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