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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 · 2020 · Paper II, Chemistry · Q69 of 120

Geo-Scientist Prelims 2020 Chemistry Q69: Which one of the following statements is correct about the Henry’s…

QuestionSolutions / Henry's law

Which one of the following statements is correct about the Henry’s law?

  1. (a) It is related to effect of pressure only on solubility of a gas in a liquid
  2. (b) It is related to effect of temperature only on solubility of a gas in a liquid
  3. (c) It is related to effect of pressure as well as temperature on solubility of a gas in a liquid
  4. (d) It is related to effect of pressure as well as temperature on solubility of a gas in a solid

Answer: (a) It is related to effect of pressure only on solubility of a gas in a liquid

Henry's law: p = KH·x — solubility of a gas in a liquid is proportional to its partial pressure at constant temperature → (a). Temperature changes the value of KH, but the law itself states the pressure effect.

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