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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 · 2021 · Paper II, Chemistry · Q30 of 120

Geo-Scientist Prelims 2021 Chemistry Q30: Which one of the following substances has highest proton affinity?

QuestionAcids and bases / proton affinity

Which one of the following substances has highest proton affinity?

  1. (a) H₂O
  2. (b) NH₃
  3. (c) H₂S
  4. (d) CH₃COOH

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