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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 · Q63 of 120

Geo-Scientist Prelims 2026 Chemistry Q63: The osmotic pressure of 0·01 mol dm⁻³ solutions of the following…

QuestionSolutions / van 't Hoff factor

The osmotic pressure of 0·01 mol dm⁻³ solutions of the following substances was measured at 300 K :

  1. Acetic acid in benzene
  2. Acetic acid in water
  3. NaCl in water
  4. Glucose in water

Which one of the following is the correct order (increasing) of osmotic pressure of the above solutions ?

  1. (a) Glucose in water, acetic acid in water, acetic acid in benzene, NaCl in water
  2. (b) Glucose in water, acetic acid in benzene, acetic acid in water, NaCl in water
  3. (c) Acetic acid in benzene, glucose in water, acetic acid in water, NaCl in water
  4. (d) NaCl in water, acetic acid in water, acetic acid in benzene, glucose in water

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