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Physics - Thermodynamics

Practise 188 MHTCET previous year questions on Thermodynamics, compiled from papers spanning 2007 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 MHTCET tests.

Thermodynamics has been asked in 11 of the 17 years of MHTCET papers analysed (2007–2026), with 188 questions in all. 49% of them were easy, 44% moderate and 7% tough. Most of its questions came from 2024, with 40 questions that year. In the last three years (2024–2026) it had 110 questions across 59 papers, about 1.9 per paper.

The chapter's 6 topics are not weighted equally: Thermodynamic Processes (119 questions, 63%), First Law of Thermodynamics (38 questions, 20%), and Heat Engine, Refrigerator and Second Law of Thermodynamics (17 questions, 9%) have been asked the most. Thermodynamic Processes has also led over the last five years, with 93 questions. Thermodynamic Processes has produced the most tough questions (9).

  1. 1An ideal rigid diatomic gas undergoes an adiabatic change . If the relation between temperature and volume is constant then the value of x i20 Apr, 2026 (M)Thermodynamic Processes
  2. 2A rigid diatomic gas is compressed adiabatically to volume , where is the initial volume. The initial temperature of the gas is ' ' K and th20 Apr, 2026 (M)Thermodynamic Processes
  3. 3An ideal gas having pressure , volume and temperature is expanded isothermally, to a volume and final pressure . The same gas is expanded ad20 Apr, 2026 (E)Thermodynamic Processes
  4. 4The efficiency of Carnot engine which operates between the two temperatures K and K is20 Apr, 2026 (E)Heat Engine, Refrigerator andSecond Law of Thermodynamics
  5. 5The thermodynamic process in which no work is done by the gas or on the gas is19 Apr, 2026 (M)Thermodynamic Processes
  6. 6A gas at normal temperature is suddenly compressed to one-fourth of its original volume. If , then the increase in the temperature of the ga19 Apr, 2026 (M)Thermodynamic Processes
  7. 7An ideal gas having pressure P, volume V and temperature T undergoes a thermodynamic process in which and . Then, for the gas19 Apr, 2026 (E)First Law of Thermodynamics
  8. 8Which of the following graphs between pressure and volume of a gas correctly shows isochoric process in thermodynamics?18 Apr, 2026 (M)Thermodynamic Processes
  9. 9In thermodynamic process for free expansion, select the 'WRONG' statement out of the following options.18 Apr, 2026 (M)Thermodynamic Processes
  10. 10At a pressure P and temperature T, 7 gram of oxygen occupies a volume V. The equation of state will be (Molecular weight of Oxygen )18 Apr, 2026 (E)Thermodynamic Systems
  11. 11An ideal gas with pressure P, volume V and temperature T is expanded isothermally to volume 2V and a final pressure . The same gas is expand18 Apr, 2026 (E)Thermodynamic Processes
  12. 12An ideal monoatomic gas is taken around the cycle ABCDA as shown in the P.V diagram. The work done during the cycle is18 Apr, 2026 (E)Thermodynamic Processes
  13. 13A Carnot engine, whose efficiency is 40% takes heat from a source maintained at temperature 600K. To have an efficiency 60%, the intake temp17 Apr, 2026 (M)Heat Engine, Refrigerator andSecond Law of Thermodynamics
  14. 14Two cylinders A and B fitted with pistons contain equal amount of an ideal diatomic gas at 303 K. The piston of cylinder A is free to move a17 Apr, 2026 (E)First Law of Thermodynamics
  15. 15A thermodynamic system is compressed adiabatically, then its temperature17 Apr, 2026 (E)Thermodynamic Processes
  16. 16A carnot engine having efficiency , operates between the source temperature and the sink temperature . Its efficiency increases to , when is17 Apr, 2026 (E)Heat Engine, Refrigerator and Second Law of Thermodynamics
  17. 17An ideal gas at C is compressed adiabatically to of its original volume. If , then the rise in temperature of a gas is16 Apr, 2026 (M)Thermodynamic Processes
  18. 18A monoatomic gas at pressure P having volume V expands isothermally to a volume 3V and then adiabatically to a volume 81 V. The final pressu16 Apr, 2026 (M)Thermodynamic Processes
  19. 19One gram of a liquid is converted to vapour at Pa pressure. If 10% of the heat supplied is used for increasing the volume by during this pha16 Apr, 2026 (E)First Law of Thermodynamics
  20. 20A Carnot engine with efficiency 50% takes heat from a source at 600 K. To increase the efficiency by 20%, keeping temperature of the sink sa16 Apr, 2026 (E)Heat Engine, Refrigerator andSecond Law of Thermodynamics
  21. 21A monoatomic gas is stored in a thermally insulated container and the gas is suddenly compressed to of its initial volume. The ratio of fina15 Apr, 2026 (M)Thermodynamic Processes
  22. 22In thermodynamic isobaric process15 Apr, 2026 (M)Thermodynamic Processes
  23. 23In a cyclic process, work done by the system is15 Apr, 2026 (E)Thermodynamic Processes
  24. 24The change in internal energy of the mass of gas, when the volume changes from V to 2V at constant pressure P is ( is the ratio of specific 13 Apr, 2026 (M)First Law of Thermodynamics
  25. 25A sample of gas at temperature is adiabatically expanded to double its volume. The work done by the gas in the process is (given, ):13 Apr, 2026 (E)First Law of Thermodynamics
  26. 26Two samples A and B of gas initially at the same pressure and temperature. They are compressed from volume to (A isothermally and B adiabati11 Apr, 2026 (M)Thermodynamic Processes
  27. 27An ideal gas undergoes cyclic process ABCDA as shown in given p-V diagram. What is the magnitude of amount of work done by the gas?11 Apr, 2026 (M)Thermodynamic Processes
  28. 28Carnot engine operating between temperatures and has efficiency . When is lowered by K, its efficiency becomes . Temperatures and are respec11 Apr, 2026 (E)Heat Engine, Refrigerator and Second Law of Thermodynamics
  29. 29An insulated container contains a monoatomic gas of molar mass 'm'. The container is moving with velocity 'V'. If it is stopped suddenly, th11 Apr, 2026 (E)First Law of Thermodynamics
  30. 30If is the amount of heat supplied to 'n' moles of a rigid diatomic gas at constant pressure, is the change in internal energy and is the wor11 Apr, 2026 (E)First Law of Thermodynamics
  31. 31A rigid diatomic gas undergoes adiabatic change. Its pressure P and temperature T are related as where x is11 Apr, 2026 (E)Thermodynamic Processes
  32. 32The relation between efficiency of Carnot engine and coefficient of performance ( ) of refrigerator is05 May, 2025 (E)Heat Engine, Refrigerator and Second Law of Thermodynamics
  33. 33A gas having and volume 360 c.c. is suddenly compressed to 90 c.c. If the initial pressure of the gas is P , then the final pressure will be05 May, 2025 (E)Thermodynamic Processes
  34. 34A monoatomic ideal gas is compressed adiabatically to of its initial volume. if the initial temperature of the gas is ' and the final temper27 Apr, 2025 (E)Thermodynamic Processes
  35. 35Heat is supplied to a diatomic gas at constant pressure. The ratio of is [Given heat supplied, change in internal energy, work done]27 Apr, 2025 (E)First Law of Thermodynamics
  36. 36A Carnot heat engine has an efficiency of . The energy is supplied to the engine at the rate of 2 kW . The output power of the engine is27 Apr, 2025 (E)Heat Engine, Refrigerator and Second Law of Thermodynamics
  37. 37In case of free expansion, which one of the following statements is ?26 Apr, 2025 (M)Thermodynamic Processes
  38. 38An ideal gas expands adiabatically, . To reduce the r.m.s. velocity of the molecules 4 times, the gas has to be expanded26 Apr, 2025 (M)Thermodynamic Processes
  39. 39The heat energy that must be supplied to 14 gram of nitrogen at room temperature to raise its temperature by at constant pressure is (Molecu26 Apr, 2025 (M)First Law of Thermodynamics
  40. 40An ideal gas taken through a process ABCA as shown in figure. If the net heat supplied to gas in the cycle is 5 J , then the work done by th26 Apr, 2025 (E)First Law of Thermodynamics
  41. 41Two cylinders A and B fitted with piston contain equal amount of an ideal diatomic gas at temperature T K. The piston of cylinder A is free 26 Apr, 2025 (E)First Law of Thermodynamics
  42. 42In the thermodynamic processes, which of the following statements is NOT true?26 Apr, 2025 (E)Thermodynamic Processes
  43. 43During the isothermal expansion, a confined ideal gas does (-150) J of work against its surroundings. This means that25 Apr, 2025 (M)First Law of Thermodynamics
  44. 44A monoatomic ideal gas is compressed adiabatically to of its initial volume. If initial temperature of the gas is ' T ' K and final temperat25 Apr, 2025 (M)Thermodynamic Processes
  45. 45A sample of an ideal gas is heated at constant pressure. If 100J of heat is supplied to the gas , the work done by the gas is25 Apr, 2025 (E)First Law of Thermodynamics
  46. 46A balloon is filled at and 1 atmospheric pressure by volume helium gas. At and 0.5 atmospheric pressure, the volume of helium gas will be25 Apr, 2025 (E)Thermodynamic Systems
  47. 47Heat supplied dQ = increased in internal energy dU is true for25 Apr, 2025 (E)First Law of Thermodynamics
  48. 48A polyatomic gas is compressed to of its volume adiabatically. If its initial pressure is , its new pressure will be Given,23 Apr, 2025 (M)Thermodynamic Processes
  49. 49Two moles of an ideal monoatomic gas undergo a cyclic process as shown in figure. The temperatures in different states are given as . The wo23 Apr, 2025 (M)First Law of Thermodynamics
  50. 50A polyatomic gas at pressure 'P', having volume 'V' expands isothermally to a volume ' 3 V ' and then adiabatically to a volume ' 24 V '. Th23 Apr, 2025 (E)Thermodynamic Processes

Frequently Asked Questions

1.How many questions are available for Thermodynamics?

This chapter includes 188 questions compiled from MHTCET papers spanning 2007 to 2026.

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

These are MHTCET 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 MHTCET Physics?

Thermodynamics has appeared in 11 of the 17 years of MHTCET papers covered here, with 188 questions across 88 papers - about 2 per paper it appears in.

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

Of the 188 questions analysed for this chapter, 49% are easy, 44% moderate and 7% tough. 2024 had the most, with 40 questions.

5.Which topics in Thermodynamics should I focus on?

These topics have carried the most weightage in Thermodynamics:

  • Thermodynamic Processes - 119 questions (63%)
  • First Law of Thermodynamics - 38 questions (20%)
  • Heat Engine, Refrigerator and Second Law of Thermodynamics - 17 questions (9%)
  • Thermodynamic Processes has produced the most tough questions (9).
6.Is Thermodynamics's weightage in MHTCET going up or down?

Across all 88 papers analysed, Thermodynamics has averaged about 2.1 questions per paper. In the last three years (2024–2026), that average has stayed about the same, at about 1.9 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.