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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 · Q16 of 120

Geo-Scientist Prelims 2023 Chemistry Q16: The basicity of pyrophosphoric acid, orthophosphorus acid and…

Questionp-block / oxoacids of phosphorus

The basicity of pyrophosphoric acid, orthophosphorus acid and hypophosphorus acid are respectively :

  1. (a) 4, 2, 1
  2. (b) 4, 3, 2
  3. (c) 3, 3, 3
  4. (d) 3, 2, 1

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