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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 · Q17 of 120

Geo-Scientist Prelims 2025 Chemistry Q17: The correct order of reducing nature of the oxy acids is :

Questionp-block / oxoacids of phosphorus

The correct order of reducing nature of the oxy acids is :

  1. (a) H₃PO₄ > H₃PO₃ > H₃PO₂
  2. (b) H₃PO₂ > H₃PO₃ > H₃PO₄
  3. (c) H₃PO₃ > H₃PO₄ > H₃PO₂
  4. (d) H₃PO₂ > H₃PO₄ > H₃PO₃

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