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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 · Q33 of 120

Geo-Scientist Prelims 2023 Chemistry Q33: Which one of the following is the conjugate base of H₂PO₄⁻ ?

QuestionIonic equilibrium / Brønsted acids and bases

Which one of the following is the conjugate base of H₂PO₄⁻ ?

  1. (a) PO₄³⁻
  2. (b) P₂O₅
  3. (c) H₃PO₄
  4. (d) HPO₄²⁻

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