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Physics - Thermodynamics

Practise 104 TS EAMCET previous year questions on Thermodynamics, compiled from papers spanning 2001 to 2025. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty TS EAMCET tests.

Thermodynamics has been asked in 23 of the 24 years of TS EAMCET papers analysed (2001–2024), with 104 questions in all. 49% of them were easy, 42% moderate and 9% tough. Most of its questions came from 2021, with 13 questions that year. In the last three years (2022–2024) it had 22 questions across 17 papers, about 1.3 per paper.

The chapter's 6 topics are not weighted equally: Thermodynamic Processes (60 questions, 58%), First Law of Thermodynamics (21 questions, 20%), and Heat Engine, Refrigerator and Second Law of Thermodynamics (16 questions, 15%) have been asked the most. Thermodynamic Processes has also led over the last five years, with 22 questions. Thermodynamic Processes has produced the most tough questions (7).

  1. 1The ratio of the work done, change in internal energy and heat absorbed when a diatomic gas expands at constant pressure is04 May, 2025 (M)First Law of Thermodynamics
  2. 2A Carnot engine uses diatomic gas as a working substance. During the adiabatic expansion part of the cycle, if the volume of the gas becomes04 May, 2025 (E)Heat Engine, Refrigerator and Second Law of Thermodynamics
  3. 3The power of a refrigerator that can make 15 kg of ice at from water at in one hour is03 May, 2025 (M)Refrigerator
  4. 4Three moles of an ideal gas undergoes a cyclic process ABCA as shown in the figure. The pressure, volume and absolute temperature at points 03 May, 2025 (M)Thermodynamic Processes
  5. 5At constant pressure, equal amounts of heat are supplied to a monatomic gas and a diatomic gas separately. The ratio of the increases in int03 May, 2025 (E)First Law of Thermodynamics
  6. 6Two moles of a gas at a temperature of expands adiabatically such that its volume increases by . If the ratio of the specific heat capacitie02 May, 2025 (M)Thermodynamic Processes
  7. 7When the temperature of a gas in a closed vessel is increased by , its pressure increases by . The initial temperature of the gas is02 May, 2025 (E)Thermodynamic Processes
  8. 8A gas is suddenly compressed such that its absolute temperature is doubled. If the ratio of the specific heat capacities of the gas is 1.5, 02 May, 2025 (E)Thermodynamic Processes
  9. 9The ratio of the specific heat capacities of a gas is 1.5 . When the gas undergoes an adiabatic process, its volume is doubled and pressure 10 May, 2024 (M)Thermodynamic Processes
  10. 10When amount of heat is supplied to a monatomic gas, the work done by the gas is . When amount of heat is supplied to a diatomic gas, the wor10 May, 2024 (E)First Law of Thermodynamics
  11. 11The efficiency of a reversible heat engine working between two temperatures is . The coefficient of performance of a refrigerator working be09 May, 2024 (M)Heat Engine, Refrigerator and Second Law of Thermodynamics
  12. 12The total internal energy of 4 moles of a diatomic gas at a temperature of is (Universal gas constant )09 May, 2024 (M)First Law of Thermodynamics
  13. 13If and dW are heat energy absorbed, change in internal energy and external work done respectively by a diamotic gas at constant pressure, th09 May, 2024 (E)Thermodynamic Processes
  14. 14In a process, the work done by the system is equal to the decrease in its internal energy. The process that the system undergoes is14 May, 2023 (M)Thermodynamic Processes
  15. 15Two moles of a triatomic gas at temperature expands adiabatically such that its volume becomes 8 times its initial volume. Later the tempera14 May, 2023 (E)First Law of Thermodynamics
  16. 16Two identical containers A and B with frictionless pistons contain the same ideal gas at the same temperature and same volume . The mass of 13 May, 2023 (M)Thermodynamic Processes
  17. 17When some amount of heat energy is supplied to a monatomic gas, the percentage of heat energy used for increasing the internal energy of the13 May, 2023 (E)Thermodynamic Processes
  18. 18The percentage of heat supplied to a diatomic ideal gas that is converted into work in an isobaric process is12 May, 2023 (M)Thermodynamic Processes
  19. 19Assertion : The zeroth law of thermodynamics leads to the concept of temperature. Reason : The zeroth law states that two systems in thermal20 Jul, 2022 (M)Thermodynamic Systems
  20. 20When a gas expands adiabatically, its volume is doubled while its absolute temperature is decreased by a factor of 2 . The value of the adia20 Jul, 2022 (M)Thermodynamic Processes
  21. 21An amount of of heat is transferred to a diatomic gas allowing it to expand with the pressure held constant. The work done on the gas is20 Jul, 2022 (M)First Law of Thermodynamics
  22. 22A gas system is taken through the thermodynamic cyclic process 1 → 2 → 3 → 1 as shown below. The amount of heat released by the system is20 Jul, 2022 (E)First Law of Thermodynamics
  23. 23A quantity of monoatomic gas undergoes a process in which pressure is changed linearly with volume. The pressure and volume are changed from19 Jul, 2022 (M)First Law of Thermodynamics
  24. 24An ideal gas having initial pressure , volume and temperature is allowed to expand adiabatically until its volume becomes , while its temper19 Jul, 2022 (M)Thermodynamic Processes
  25. 25Assertion : Heat and work are modes of energy transfer to a system resulting in change in its internal energy. Reason : Heat and work in the19 Jul, 2022 (E)Thermodynamic Systems
  26. 26An ideal gas at pressure undergoes an isothermal expansion until its volume is 8.0 times its initial volume. The gas is slowly and adiabatic19 Jul, 2022 (E)Thermodynamic Processes
  27. 271 . 00 kg of liquid water at 100 C undergoes a phase change into steam at 100 C at 1 . 0 atm (take it to be 1 . 00 10 5 Pa ). The initial vo18 Jul, 2022 (M)First Law of Thermodynamics
  28. 28A monoatomic gas does 100 J of work when it is expanded isobarically. How much of heat is given to the gas in the process18 Jul, 2022 (M)Thermodynamic Processes
  29. 29The net work done by an ideal gas going through the cycle as shown in the P - V diagram below is18 Jul, 2022 (E)Thermodynamic Processes
  30. 30A diatomic gas C P = 7 2 R does 200 J of work when it is expanded isobarically. The heat given to the gas in the process is18 Jul, 2022 (E)First Law of Thermodynamics
  31. 31An ideal Carnot engine whose efficiency is receives heat at . If the efficiency is to be , then intake temperature for the same exhaust temp06 Aug, 2021 (M)Heat Engine, Refrigerator and Second Law of Thermodynamics
  32. 32An engine performs of mechanical work and discards of heat each cycle. What is the thermal efficiency of the engine?06 Aug, 2021 (M)Heat Engine, Refrigerator and Second Law of Thermodynamics
  33. 33A polyatomic gas follows a law constant. Find for which the heat exchange of gas in the process becomes zero.06 Aug, 2021 (M)Thermodynamic Processes
  34. 34An ideal gas goes through a process cycle. The process, is adiabatic. Calculate the work done in the process .06 Aug, 2021 (E)Thermodynamic Processes
  35. 35A metal sheet 4 m on a side and of negligible thickness is attached to a balance and inserted into container fluid. The balance to which met05 Aug, 2021 (M)Thermodynamic Processes
  36. 36An ideal gas undergoes an adiabatic process. If the pressure of the gas is reduced by 0 . 1 % then the volume is changed by (Given r = C p C05 Aug, 2021 (M)Heat Engine, Refrigerator and Second Law of Thermodynamics
  37. 37Thermopile Bolometer is used to detect05 Aug, 2021 (E)Thermodynamic Processes
  38. 38An ideal monoatomic gas of volume V is adiabatically expanded to a volume 3 V at 27 C . The final temperature in Kelvins is (use C P C V = 505 Aug, 2021 (E)Heat Engine, Refrigerator and Second Law of Thermodynamics
  39. 39The ratio of linear expansivity to the co-efficient of a real expansion of a rectangular sheet of a solid is04 Aug, 2021 (M)Heat Engine, Refrigerator and Second Law of Thermodynamics
  40. 40Two rods whose lengths are l 1 and l 2 with heat conductivity co-efficients k 1 and k 2 are placed end to end. The heat conductivity coeffic04 Aug, 2021 (M)Thermodynamic Processes
  41. 41Two spheres of same material and radii 5 m and 2 m are at temperature 200 K and 250 K respectively. The ratio of energies radiated by them p04 Aug, 2021 (E)Thermodynamic Processes
  42. 42500 g of water is heated from 30 C to 90 C . What is the change in its internal energy? (Specific heat of water is 4184 J kg - 1 K - 1 )04 Aug, 2021 (E)First Law of Thermodynamics
  43. 43A tyre pumped to a pressure of 2 atmosphere, suddenly bursts. If the temperature of air before expansion is T then the air temperature after04 Aug, 2021 (E)Thermodynamic Processes
  44. 44What is the name of ideal-gas process in which no heat is transferred?14 Sep, 2020 (M)Thermodynamic Processes
  45. 45A Carnot engine operates between temperature and . A second Carnot engine uses all the heat rejected by the engine and operates between temp14 Sep, 2020 (E)Heat Engine, Refrigerator and Second Law of Thermodynamics
  46. 46An ideal gas at temperature , pressure occupies a volume . If its temperature is halved and pressure doubled, what is its new volume?11 Sep, 2020 (M)Thermodynamic Processes
  47. 47A Carnot engine whose efficiency is , receives heat at . If the efficiency is to be , the source temperature for the same exhaust temperatur11 Sep, 2020 (M)Heat Engine, Refrigerator and Second Law of Thermodynamics
  48. 48A system goes from and via two processes I and II as shown in figure. If and are the changes in internal energies in the processes I and II 11 Sep, 2020 (M)Thermodynamic Systems
  49. 49A gas is at constant pressure . When a heat energy of is supplied to the gas, its volume changes by . What is the increase in its internal e11 Sep, 2020 (E)First Law of Thermodynamics
  50. 50Certain amount of heat supplied to an ideal gas under isothermal condition will result in11 Sep, 2020 (E)Thermodynamic Processes

Frequently Asked Questions

1.How many questions are available for Thermodynamics?

This chapter includes 104 questions compiled from TS EAMCET papers spanning 2001 to 2025.

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

These are TS EAMCET 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 TS EAMCET Physics?

Thermodynamics has appeared in 24 of the 25 years of TS EAMCET papers covered here, with 104 questions across 60 papers - about 2 per paper it appears in.

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

Of the 104 questions analysed for this chapter, 49% are easy, 42% moderate and 9% tough. 2021 had the most, with 13 questions.

5.Which topics in Thermodynamics should I focus on?

These topics have carried the most weightage in Thermodynamics:

  • Thermodynamic Processes - 60 questions (58%)
  • First Law of Thermodynamics - 21 questions (20%)
  • Heat Engine, Refrigerator and Second Law of Thermodynamics - 16 questions (15%)
  • Thermodynamic Processes has produced the most tough questions (7).
6.Is Thermodynamics's weightage in TS EAMCET going up or down?

Across all 60 papers analysed, Thermodynamics has averaged about 1.7 questions per paper. In the last three years (2022–2024), that average has fallen, at about 1.3 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.