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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 · Q48 of 120

Geo-Scientist Prelims 2023 Chemistry Q48: Consider the following statements regarding Isothermal and…

QuestionThermodynamics / work in expansion

Consider the following statements regarding Isothermal and Adiabatic processes :

  1. Work done in a reversible isothermal process is the maximum work done.
  2. Adiabatic work of expansion is greater than the isothermal work of expansion of an ideal gas.
  3. Reversible and isothermal work of expansion for an ideal gas is less than that for a Van der Waals gas.
  4. In an adiabatic expansion of a gas, cooling is produced.

Which of the statements given above are correct ?

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

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