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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 · 2021 · Paper I, General Studies · Q6 of 120

Geo-Scientist Prelims 2021 General Studies Q6: Which one of the following is the correct order of relative…

QuestionMetals / activity series

Which one of the following is the correct order of relative reactivities of metals Ca, Al, Hg and Au?

  1. (a) Ca > Al > Hg > Au
  2. (b) Au > Hg > Al > Ca
  3. (c) Al > Ca > Hg > Au
  4. (d) Ca > Al > Au > Hg

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