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Physics - Thermodynamics

Practise 58 NEET previous year questions on Thermodynamics, compiled from papers spanning 2002 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 NEET tests.

Thermodynamics has been asked in 24 of the 39 years of NEET papers analysed (1988–2026), with 58 questions in all. 50% of them were easy, 31% moderate and 19% tough. Most of its questions came from 2016, with 5 questions that year. In the last three years (2024–2026) it had 7 questions across 13 papers, about 0.5 per paper.

The chapter's 4 topics are not weighted equally: Thermodynamic Processes (28 questions, 48%), Heat Engine, Refrigerator and Second Law of Thermodynamics (16 questions, 28%), and First Law of Thermodynamics (11 questions, 19%) have been asked the most. Thermodynamic Processes has also led over the last five years, with 5 questions. Thermodynamic Processes has produced the most tough questions (5).

  1. 1An electric heater supplies heat to a system at a rate of W. If the system performs work at a rate of J/s, then the rate at which internal e2026 (Cancelled)First Law of Thermodynamics
  2. 2In an adiabatic expansion, the temperature of one mole of an ideal monatomic gas ( ) decreases from K to K. The work done by the gas in the 2026 (Re-NEET)Thermodynamic Processes
  3. 3One mole of an ideal monatomic gas undergoes a cyclic process as shown in the figure. The total heat supplied to the gas is :2026 (Re-NEET)First Law of Thermodynamics
  4. 4A container has two chambers of volumes litres and litres separated by a partition made of a thermal insulator. The chambers contains and mo2025Thermodynamic Systems
  5. 5Two gases and are filled at the same pressure in separate cylinders with movable pistons of radius and , respectively. On supplying an equal2025First Law of Thermodynamics
  6. 6A thermodynamic system is taken through the cycle . The work done by the gas along the path is:2024Thermodynamic Processes
  7. 7The equilibrium state of a thermodynamic system is described by A. Pressure B. Total heat C. Temperature D. Volume E. Work done2024 (Re-NEET)Thermodynamic Systems
  8. 8A Carnot engine has an efficiency of 50 % when its source is at a temperature 327 C . The temperature of the sink is:2023 (All India)Heat Engine, Refrigerator and Second Law of Thermodynamics
  9. 9For the given cycle, the work done during isobaric process is:2023 (Manipur)Thermodynamic Processes
  10. 10A container of volume contains 0.2 mole of hydrogen gas and 0.3 mole of argon gas. The pressure of the system at temperature will be2023 (Manipur)Thermodynamic Processes
  11. 11An ideal gas undergoes four different processes from the same initial state as shown in the figure below. Those processes are adiabatic, iso2022 (Phase 1)Thermodynamic Processes
  12. 12An ideal gas follows a process described by the equation from the initial to final ( thermodynamic states, where is a constant. Then:2022 (Phase 2)Thermodynamic Systems
  13. 13Two cylinders A and B of equal capacity are connected to each other via a stop cock. A contains an ideal gas at standard temperature and pre2020 (Phase 1)Thermodynamic Processes
  14. 14The efficiency of a Carnot engine depends upon2020 (Phase 2)Heat Engine, Refrigerator and Second Law of Thermodynamics
  15. 15The P - V diagram for an ideal gas in a piston cylinder assembly undergoing a thermodynamic process is shown in the figure. The process is2020 (Phase 2)Thermodynamic Processes
  16. 16In which of the following processes, heat is neither absorbed nor released by a system?2019 (All India)Thermodynamic Processes
  17. 17The Volume V of a monoatomic gas varies with its temperature T , as shown in the graph. The ratio of work done by the gas, to the heat absor2018Thermodynamic Processes
  18. 18The efficiency of an ideal heat engine working between the freezing point and boiling point of water, is2018Heat Engine, Refrigerator and Second Law of Thermodynamics
  19. 19Thermodynamic processes are indicated in the following diagram. Match the following Column 1 Column - 2 P. Process I a. Adiabatic Q. Process2017Thermodynamic Processes
  20. 20A gas mixture consists of 2 moles of O 2 and 4 moles of Ar at temperature T . Neglecting all vibrational modes, the total internal energy of2017First Law of Thermodynamics
  21. 21A Carnot s engine having an efficiency of 1 10 as heat engine, is used as a refrigerator. If the work done on the system is 10 J, the amount2017Heat Engine, Refrigerator and Second Law of Thermodynamics
  22. 22A refrigerator works between 4 o C and 30 o C . It is required to remove 600 calories of heat every second in order to keep the temperature 2016 (Phase 1)Heat Engine, Refrigerator and Second Law of Thermodynamics
  23. 23A gas is compressed isothermally to half its initial volume. The same gas is compressed separately through an adiabatic process until its vo2016 (Phase 1)Thermodynamic Processes
  24. 24One mole of an ideal monatomic gas undergoes a process described by the equation P V 3 = constant. The heat capacity of the gas during this 2016 (Phase 2)Thermodynamic Processes
  25. 25The temperature inside a refrigerator is t 2 o C and the room temperature is t 1 o C . The amount of heat delivered to the room for each jou2016 (Phase 2)Heat Engine, Refrigerator and Second Law of Thermodynamics
  26. 26A given sample of an ideal gas occupies a volume, V at a pressure, P and absolute temperature, T . The mass of each molecule of the gas is m2016 (Phase 2)Thermodynamic Processes
  27. 27Figure below shows two paths that may be taken by a gas to go from a state A to a state C. In process AB, 400 J of heat is added to the syst2015 (Phase 1)Thermodynamic Processes
  28. 28A Carnot engine, having an efficiency of = 1 10 as heat engine, is used as a refrigerator. If the work done on the system is 10 J , the amou2015 (Phase 1)Heat Engine, Refrigerator and Second Law of Thermodynamics
  29. 29One mole of an ideal diatomic gas undergoes a transition from A to B along a path AB as shown in the figure, The change in internal energy o2015 (Phase 1)Thermodynamic Processes
  30. 30An ideal gas is compressed to half of its initial volume by means of several processes. Which of the process results in the maximum work don2015 (Phase 2)Thermodynamic Processes
  31. 31The coefficient of performance of a refrigerator is 5 . If the temperature inside the freezer is - 20 ° C , the temperature of the surroundi2015 (Phase 2)Heat Engine, Refrigerator and Second Law of Thermodynamics
  32. 32A monoatomic gas at a pressure P , having a volume V expands isothermally to a volume 2 V and then adiabatically to a volume 16 V . The fina2014Thermodynamic Processes
  33. 33A thermodynamics system undergoes cyclic process A B C D A as shown in Figure. The work done by the system in the cycle is:2014Thermodynamic Processes
  34. 34A gas is taken through the cycle , as shown. What is the net work done by the gas?2013 (All India)Thermodynamic Processes
  35. 35In the given ( diagram, what is the relation between pressures and ?2013 (All India)Thermodynamic Processes
  36. 36A system is taken from state a to state by two paths and as shown in the figure. The internal energy a is J. Along the path adc the amount o2013 (Karnataka)First Law of Thermodynamics
  37. 37Which of the following relations does not give the equation of an adiabatic process, where terms have their usual meaning?2013 (Karnataka)Thermodynamic Processes
  38. 38Two Carnot engines and are operated in series. The engine receives heat from the source at temperature and rejects the heat to the sink at t2013 (Karnataka)Heat Engine, Refrigerator and Second Law of Thermodynamics
  39. 39An ideal gas goes from state to state via three different processes as indicated in the diagram If indicate the heat absorbed by the gas alo2012 (Mains)First Law of Thermodynamics
  40. 40A thermodynamic system is taken through the cycle as shown in figure. Heat rejected by the gas during the cycle is2012 (Screening)Thermodynamic Processes
  41. 41One mole of an ideal gas goes from an initial state to final state via two processes. It first undergoes isothermal expansion from volume to2012 (Screening)Thermodynamic Processes
  42. 42A mass of diatomic gas at a pressure of is compressed adiabatically so that its temperature rise from to . The pressure of the gas is final 2011 (Mains)Thermodynamic Processes
  43. 43When of ice at melts to water at , the resulting change in its entropy, taking latent heat of ice to be , is2011 (Screening)Heat Engine, Refrigerator and Second Law of Thermodynamics
  44. 44During an isothermal expansion, a confined ideal gas does of work against its surroundings. This implies that2011 (Screening)First Law of Thermodynamics
  45. 45If and represent the increase in internal energy and work done by the system respectively in a thermodynamical process, which of the followi2010 (Screening)Thermodynamic Processes
  46. 46In thermodynamic processes which of the following statements is not true?2009 (Mains)Thermodynamic Processes
  47. 47The internal energy change in a system that has absorbed cal of heat and done of work is :2009 (Mains)First Law of Thermodynamics
  48. 48In thermodynamic processes which of the following statements is not true?2009 (Screening)Thermodynamic Processes
  49. 49The internal energy change in a system that has absorbed of heat and done of work is2009 (Screening)First Law of Thermodynamics
  50. 50If and denote respectively the heat added, change in internal energy and the work done in a closed cycle process, then2008 (Mains)First Law of Thermodynamics

Frequently Asked Questions

1.How many questions are available for Thermodynamics?

This chapter includes 58 questions compiled from NEET papers spanning 2002 to 2026.

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

These are NEET questions specifically for the Thermodynamics chapter. Questions from other exams like AIIMS or JIPMER are organised separately under their respective exam sections.

3.Is Thermodynamics an important chapter for NEET Physics?

Thermodynamics has appeared in 24 of the 25 years of NEET papers covered here, with 58 questions across 36 papers - about 2 per paper it appears in.

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

Of the 58 questions analysed for this chapter, 50% are easy, 31% moderate and 19% tough. 2016 had the most, with 5 questions.

5.Which topics in Thermodynamics should I focus on?

These topics have carried the most weightage in Thermodynamics:

  • Thermodynamic Processes - 28 questions (48%)
  • Heat Engine, Refrigerator and Second Law of Thermodynamics - 16 questions (28%)
  • First Law of Thermodynamics - 11 questions (19%)
  • Thermodynamic Processes has produced the most tough questions (5).
6.Is Thermodynamics's weightage in NEET going up or down?

Across all 36 papers analysed, Thermodynamics has averaged about 1.6 questions per paper. In the last three years (2024–2026), that average has fallen, at about 0.5 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.