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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 · 2026 · Paper II, Chemistry · Q45 of 120

Geo-Scientist Prelims 2026 Chemistry Q45: The root mean square velocity of gas A at 27°C was found to be…

QuestionGaseous state / rms speed

The root mean square velocity of gas A at 27°C was found to be equal to the root mean square velocity of gas B at 327°C. The ratio of molar mass of A to B is

  1. (a) 109 : 9
  2. (b) 9 : 109
  3. (c) 2 : 1
  4. (d) 1 : 2

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