JEE Physics

Isothermal & Adiabatic Processes: JEE Questions & Solutions

28 previous-year JEE Physics questions on Isothermal & Adiabatic Processes, each with a worked step-by-step solution.

Intermediate

Previous-year questions

  1. 01The volume of an ideal gas increases 8 times and temperature becomes (1/4)^th of initial temperature during a reversible change. If there…MCQEasyJEE 2026
  2. 02One mole of an ideal diatomic gas expands from volume V to 2V isothermally at a temperature 27^°C and does W joule of work. If the gas…MCQMediumJEE 2026
  3. 03Match List-I with List-II | List-I | List-II | |---|---| | (A) Pressure varies inversely with volume of an ideal gas. | (I) Adiabatic…MCQEasyJEE 2025
  4. 04An ideal gas initially at 0^° C temperature, is compressed suddenly to one fourth of its volume. If the ratio of specific heat at constant…NVAEasyJEE 2025
  5. 05Given below are two statements. One is labelled as Assertion (A) and the other is labelled as Reason (R): Assertion (A): In an insulated…MCQMediumJEE 2025
  6. 06The workdone in an adiabatic change in an ideal gas depends upon:MCQEasyJEE 2025
  7. 07Given below are two statements. One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): With the increase…MCQMediumJEE 2025
  8. 08A poly-atomic molecule (C_V = 3R, C_P = 4R, where R is the gas constant) goes from phase space point A (P_A = 10⁵ Pa, V_A = 4 × 10⁻⁶ m³) to…MCQMediumJEE 2025
  9. 09In an adiabatic process, which of the following statements is true?MCQEasyJEE 2025
  10. 10Identify the characteristics of an adiabatic process in a monatomic gas. (A) Internal energy is constant. (B) Work done in the process is…MCQEasyJEE 2025
  11. 11A piston of mass M is hung from a massless spring whose restoring force law goes as F = -kx³, where k is the spring constant of appropriate…MCQMediumJEE 2025
  12. 12A gas is kept in a container having walls which are thermally non-conducting. Initially the gas has a volume of 800 cm³ and temperature…MCQEasyJEE 2025
  13. 13An ideal gas exists in a state with pressure P₀, volume V₀. It is isothermally expanded to 4 times of its initial volume (V₀), then…MCQMediumJEE 2025
  14. 14Match List-I with List-II. | List-I | List-II | | --- | --- | | (A) Isothermal | (I) Δ W (work done) = 0 | | (B) Adiabatic | (II) Δ Q…MCQEasyJEE 2025
  15. 15A monoatomic gas having γ = 5/3 is stored in a thermally insulated container and the gas is suddenly compressed to ( 1/8)^th of its initial…MCQEasyJEE 2025
  16. 16During an adiabatic process, the pressure of a gas is proportional to the cube of its absolute temperature. The ratio of C_p/C_v is:MCQMediumJEE 2024
  17. 17Two thermodynamical processes A and B are shown on a log P versus log V plot as two straight lines drawn from the origin: line A makes an…MCQMediumJEE 2024
  18. 18If 3 moles of monoatomic gas (γ = 5/3) is mixed with 2 moles of diatomic gas (γ = 7/5), the value of the adiabatic exponent γ for the…MCQMediumJEE 2024
  19. 19The given figure represents two isobaric processes for the same mass of an ideal gas. Then: The figure shows: a graph with volume V on the…MCQEasyJEE 2024
  20. 20A spherical balloon of radius 1 m is inflated with air at constant temperature. The work done to increase the volume of the balloon by 1 m³…MCQEasyJEE 2024
  21. 21In an Isothermal change, the change in pressure and volume of a gas can be represented for three different temperatures; T₃ > T₂ > T₁ as:MCQEasyJEE 2023
  22. 22Match List I with List II | List I | List II | |---|---| | (A) Isothermal Process | (I) Work done by the gas decreases internal energy | |…MCQEasyJEE 2023
  23. 23Heat is given to an ideal gas in an isothermal process. A. Internal energy of the gas will decrease. B. Internal energy of the gas will…MCQEasyJEE 2023
  24. 24A sample of gas at temperature T is adiabatically expanded to double its volume. The work done by the gas in the process is (given, γ =…MCQMediumJEE 2023
  25. 25Consider two containers A and B containing monoatomic gases at the same Pressure (P), Volume (V), and Temperature (T). The gas in A is…MCQEasyJEE 2023
  26. 26A gas is compressed adiabatically, which one of the following statements is NOT true.MCQEasyJEE 2023
  27. 27The Thermodynamic process, in which internal energy of the system remains constant isMCQEasyJEE 2023
  28. 28The initial pressure and volume of an ideal gas are P₀ and V₀. The final pressure of the gas when the gas is suddenly compressed to volume…MCQEasyJEE 2023

Frequently asked questions

Our bank has 28 previous-year JEE Physics questions tagged to Isothermal & Adiabatic Processes, drawn from JEE papers between 2023 and 2026, including 2 from 2026 alone. Each comes with a full step-by-step solution.

Isothermal & Adiabatic Processes is rated Intermediate overall for JEE Physics. The PYQs on this page break down as 18 easy, 10 medium.

Of the 28 previous-year questions on Isothermal & Adiabatic Processes, 27 are multiple-choice (MCQ) and 1 are numerical-value (NVA) questions.

Based on recent paper analysis, Isothermal & Adiabatic Processes is worth about 2 marks in JEE Main. It sits in Thermodynamics, a Class 11 Physics chapter.

More Thermodynamics topics

First Law & Internal Energy23Second Law & Heat Engines6Zeroth Law of Thermodynamics0Reversible & Irreversible Processes0

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