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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 · 2023 · Paper II, Chemistry · Q59 of 120

Geo-Scientist Prelims 2023 Chemistry Q59: Which of the following expressions regarding the criteria for…

QuestionThermodynamics / criteria of spontaneity

Which of the following expressions regarding the criteria for spontaneity of chemical processes are correct ?

  1. dS_{U,V} ≥ 0
  2. dU_{S,V} ≥ 0
  3. dA_{T,V} ≤ 0
  4. dG_{T,p} ≤ 0

Select the correct answer using the code given below :

  1. (a) 3 and 4 only
  2. (b) 1 and 3 only
  3. (c) 1, 2 and 3
  4. (d) 1, 3 and 4

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