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Physics - Thermodynamics

Practise 49 JEE Advanced previous year questions on Thermodynamics, compiled from papers spanning 2006 to 2026. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty JEE Advanced tests.

Thermodynamics has been asked in 21 of the 27 years of JEE Advanced papers analysed (2000–2026), with 49 questions in all. 16% of them were easy, 57% moderate and 27% tough. Most of its questions came from 2022, with 4 questions that year. In the last three years (2024–2026) it had 7 questions across 6 papers, about 1.2 per paper.

The chapter's 5 topics are not weighted equally: Thermodynamic Processes (26 questions, 53%), Thermodynamic Systems (11 questions, 22%), and First Law of Thermodynamics (10 questions, 20%) have been asked the most. Thermodynamic Processes has also led over the last five years, with 10 questions. Thermodynamic Processes has produced the most tough questions (8).

  1. 1A quasi-static cycle of a monoatomic ideal gas contains an isothermal process , followed by an isochoric process and an adiabatic process as2026 (Paper 1)Thermodynamic Processes
  2. 2As shown in the figure, five Carnot engines, each with efficiency and same number of cycles per unit time, are operating between six heat re2026 (Paper 1)Heat Engine, Refrigerator andSecond Law of Thermodynamics
  3. 3Ten moles of an ideal monoatomic gas, initially in state at atmospheric pressure and temperature C, is enclosed in a metal cylinder of volum2026 (Paper 2)Thermodynamic Processes
  4. 4The efficiency of a Carnot engine operating with a hot reservoir kept at a temperature of 1000 K is 0.4. It extracts 150 J of heat per cycle2025 (Paper 2)Heat Engine, Refrigerator and Second Law of Thermodynamics
  5. 5An ideal monatomic gas of n moles is taken through a cycle consisting of consecutive adiabatic and isobaric quasi-static processes, as shown2025 (Paper 2)Thermodynamic Processes
  6. 6The left and right compartments of a thermally isolated container of length are separated by a thermally conducting, movable piston of area 2025 (Paper 2)Thermodynamic Processes
  7. 7One mole of a monatomic ideal gas undergoes the cyclic process , as shown in the P-T diagram. Match the quantities mentioned in List-I with 2024 (Paper 1)Thermodynamic Processes
  8. 8One mole of an ideal gas expands adiabatically from an initial state ( T A , V 0 ) to final state ( T f , 5 V 0 ) . Another mole of the same2023 (Paper 1)Thermodynamic Processes
  9. 9A closed container contains a homogeneous mixture of two moles of an ideal monatomic gas = 5 3 and one mole of an ideal diatomic gas = 7 5 .2023 (Paper 1)First Law of Thermodynamics
  10. 10One mole of an ideal gas undergoes two different cyclic processes I and II , as shown in the P - V diagrams below. In cycle I , processes a 2023 (Paper 2)Thermodynamic Processes
  11. 11An ideal gas of density = 0 . 2 kg m - 3 enters a chimney of height h at the rate of = 0 . 8 kg s - 1 from its lower end, and escapes throug2022 (Paper 1)First Law of Thermodynamics
  12. 12List I describes thermodynamic processes in four different systems. List II gives the magnitudes (either exactly or as a close approximation2022 (Paper 1)Thermodynamic Processes
  13. 13A bubble has surface tension S . The ideal gas inside the bubble has ratio of specific heats = 5 3 . The bubble is exposed to the atmosphere2022 (Paper 2)Thermodynamic Processes
  14. 14In the given P - V diagram, a monoatomic gas = 5 3 is first compressed adiabatically from state A state B . Then it expands isothermally fro2022 (Paper 2)Thermodynamic Processes
  15. 15An ideal gas undergoes a four step cycle as shown in the P - V diagram below. During this cycle, heat is absorbed by the gas in:2021 (Paper 1)Thermodynamic Processes
  16. 16Paragraph A thermally insulating cylinder has a thermally insulating and frictionless movable partition in the middle, as shown in the figur2021 (Paper 2)Thermodynamic Processes
  17. 17Paragraph A thermally insulating cylinder has a thermally insulating and frictionless movable partition in the middle, as shown in the figur2021 (Paper 2)Thermodynamic Processes
  18. 18Consider one mole of helium gas enclosed in a container at initial pressure P 1 and volume V 1 . It expands isothermally to volume 4 V 1 . A2020 (Paper 1)First Law of Thermodynamics
  19. 19A thermally isolated cylindrical closed vessel of height 8 m is kept vertically. It is divided into two equal parts by a diathermic (perfect2020 (Paper 2)Thermodynamic Systems
  20. 20A spherical bubble inside water has radius R . Take the pressure inside the bubble and the water pressure to be p 0 . The bubble now gets co2020 (Paper 2)Thermodynamic Systems
  21. 21One mole of a monoatomic ideal gas goes through a thermodynamic cycle, as shown in the volume versus temperature V - T diagram. The correct 2019 (Paper 1)Thermodynamic Systems
  22. 22A mixture of ideal gas containing 5 moles of monatomic gas and 1 mole of rigid diatomic gas is initially at pressure P 0 , volume V 0 and te2019 (Paper 2)Thermodynamic Systems
  23. 23Answer the following by appropriately matching the lists based on the information given in the paragraph. In a thermodynamics process on an 2019 (Paper 2)Thermodynamic Systems
  24. 24Answer the following by appropriately matching the lists based on the information given in the paragraph. In a thermodynamics process on an 2019 (Paper 2)Thermodynamic Systems
  25. 25One mole of a monatomic ideal gas undergoes a cyclic process as shown in the figure (where V is the volume and T is the temperature). Which 2018 (Paper 1)Thermodynamic Processes
  26. 26One mole of an ideal monatomic gas undergoes an adiabatic expansion in which its volume becomes eight times its initial value. If the initia2018 (Paper 2)Thermodynamic Processes
  27. 27One mole of a monatomic ideal gas undergoes four thermodynamic processes as shown schematically in the PV - diagram below. Among these four 2018 (Paper 2)First Law of Thermodynamics
  28. 28An ideal gas is undergoing a cyclic thermodynamic process in different ways as shown in the corresponding P-V diagrams in column 3 of the ta2017 (Paper 1)Thermodynamic Processes
  29. 29An ideal gas is undergoing a cyclic thermodynamic process in different ways as shown in the corresponding P-V diagrams in column 3 of the ta2017 (Paper 1)Thermodynamic Processes
  30. 30An ideal gas is undergoing a cyclic thermodynamic process in different ways as shown in the corresponding P-V diagrams in column 3 of the ta2017 (Paper 1)Thermodynamic Processes
  31. 31A gas is enclosed in a cylinder with a movable frictionless piston. Its initial thermodynamic state at pressure P i = 10 5 P a a n d v o l u2016 (Paper 2)Thermodynamic Processes
  32. 32An ideal monoatomic gas is confined in a horizontal cylinder by a spring loaded piston (as shown in the figure).Initially the gas is at temp2015 (Paper 2)First Law of Thermodynamics
  33. 33A thermodynamic system is taken from an initial state i with internal energy U i = 100 J to the final state f along two different paths iaf 2014 (Paper 1)Thermodynamic Systems
  34. 34Paragraph: In the figure a container is shown to have a movable (without friction) piston on top. The container and the piston are all made 2014 (Paper 2)Thermodynamic Systems
  35. 35Paragraph: In the figure a container is shown to have a movable (without friction) piston on top. The container and the piston are all made 2014 (Paper 2)First Law of Thermodynamics
  36. 36One mole of a monatomic ideal gas is taken along two cyclic processes E F G E and E F H E as shown in the PV diagram. The processes involved2013 (Paper 2)Thermodynamic Processes
  37. 37Two moles of ideal helium gas are in a rubber balloon at . The balloon is fully expandable and can be assumed to require no energy in its ex2012 (Paper 2)First Law of Thermodynamics
  38. 38of helium gas at STP is adiabatically compressed to . Taking the initial temperature to be , the work done in the process is2011 (Paper 1)Thermodynamic Processes
  39. 39One mole of a monatomic ideal gas is taken through a cycle as shown in the -V diagram. Column II gives the characteristics involved in the c2011 (Paper 2)First Law of Thermodynamics
  40. 40One mole of an ideal gas in initial state A undergoes a cyclic process , as shown in the figure. Its pressure at is . Choose the correct opt2010 (Paper 1)Thermodynamic Processes
  41. 41A diatomic ideal gas is compressed adiabatically to of its initial volume. If the initial temperature of the gas is (in kelvin) and the fina2010 (Paper 2)Thermodynamic Processes
  42. 42The figure shows the plot of an ideal gas taken through a cycle . The part is a semi-circle and is half of an ellipse. Then,2009 (Paper 2)Thermodynamic Processes
  43. 43Two soap bubbles and are kept in a closed chamber where the air is maintained at pressure . The radii of bubbles and are , respectively. Sur2009 (Paper 2)Thermodynamic Processes
  44. 44An ideal gas is expanding such that constant. The coefficient of volume expansion of the gas is2008 (Paper 1)Thermodynamic Processes
  45. 45Column I contains a list of processes involving expansion of an ideal gas. Match this with Column II describing the thermodynamic change dur2008 (Paper 2)First Law of Thermodynamics
  46. 46Paragraph: : Paragraph for Questions Nos. 14 to 16 A fixed thermally conducting cylinder has a radius and height . The cylinder is open at i2007 (Paper 1)Thermodynamic Systems
  47. 47Paragraph: : Paragraph for Questions Nos. 14 to 16 A fixed thermally conducting cylinder has a radius and height . The cylinder is open at i2007 (Paper 1)Thermodynamic Systems
  48. 48Paragraph: : Paragraph for Questions Nos. 14 to 16 A fixed thermally conducting cylinder has a radius and height . The cylinder is open at i2007 (Paper 1)Thermodynamic Systems
  49. 49Match the following for the given process2006First Law of Thermodynamics

Frequently Asked Questions

1.How many questions are available for Thermodynamics?

This chapter includes 49 questions compiled from JEE Advanced papers spanning 2006 to 2026.

2.Are these questions only from JEE Advanced, or from other exams too?

These are JEE Advanced questions specifically for the Thermodynamics chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.

3.Is Thermodynamics an important chapter for JEE Advanced Physics?

Thermodynamics has appeared in 21 of the 21 years of JEE Advanced papers covered here, with 49 questions across 32 papers - about 2 per paper it appears in.

4.What is the difficulty level of Thermodynamics questions in JEE Advanced?

Of the 49 questions analysed for this chapter, 16% are easy, 57% moderate and 27% tough. 2022 had the most, with 4 questions.

5.Which topics in Thermodynamics should I focus on?

These topics have carried the most weightage in Thermodynamics:

  • Thermodynamic Processes - 26 questions (53%)
  • Thermodynamic Systems - 11 questions (22%)
  • First Law of Thermodynamics - 10 questions (20%)
  • Thermodynamic Processes has produced the most tough questions (8).
6.Is Thermodynamics's weightage in JEE Advanced going up or down?

Across all 32 papers analysed, Thermodynamics has averaged about 1.5 questions per paper. In the last three years (2024–2026), that average has fallen, at about 1.2 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.