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UPSC Combined Geo-Scientist

Chemist

  • 2 objective papers
  • 120 questions each
  • 2 h per paper
  • 100 + 300 marks

Prelims Paper I covers general studies.

UPSC Combined Geo-Scientist, Prelims · 2026 · Paper I, General Studies · Q90 of 120

Geo-Scientist Prelims 2026 General Studies Q90: The conversion of nitrogen to ammonium by bacteria and cynobacteria…

QuestionEnvironment / Nitrogen cycle

The conversion of nitrogen to ammonium by bacteria and cynobacteria is called

  1. (a) nitrification
  2. (b) denitrification
  3. (c) ammonification
  4. (d) None of the above

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