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Chemistry - Thermodynamics (C)

Practise 322 MHTCET previous year questions on Thermodynamics (C), 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 (C) has been asked in 17 of the 17 years of MHTCET papers analysed (2007–2026), with 322 questions in all. 44% of them were easy, 48% moderate and 7% tough. Most of its questions came from 2025, with 48 questions that year. In the last three years (2024–2026) it had 140 questions across 59 papers, about 2.4 per paper.

The chapter's 5 topics are not weighted equally: First Law and Basic Fundamentals of Thermodynamics (157 questions, 49%), Laws of Thermochemistry and Enthalpy Change (104 questions, 32%), and Third law of thermodynamics (22 questions, 7%) have been asked the most. First Law and Basic Fundamentals of Thermodynamics has also led over the last five years, with 107 questions. First Law and Basic Fundamentals of Thermodynamics has produced the most tough questions (11).

  1. 1Identify the law for the statement "Overall the enthalpy change for a reaction is equal to sum of enthalpy changes of individual steps in th20 Apr, 2026 (M)Laws of Thermochemistry and Enthalpy Change
  2. 2If mole of an ideal gas expand isothermally and reversibly at C from 1 to calculate work done?20 Apr, 2026 (M)First Law and Basic Fundamentals of Thermodynamics
  3. 3Which of the following processes exhibits the decrease in internal energy of a system?20 Apr, 2026 (E)First Law and Basic Fundamentals of Thermodynamics
  4. 4Calculate the change in internal energy if an ideal gas expands from to at constant pressure 2 bar by absorbing 1800 J heat energy.20 Apr, 2026 (E)First Law and Basic Fundamentals of Thermodynamics
  5. 5The enthalpy of combustion of C, , and are , and kJ/mol. Find the enthalpy of formation of methane.20 Apr, 2026 (E)Laws of Thermochemistry and Enthalpy Change
  6. 6An ideal gas expands from initial volume to against a constant external pressure of atm. What is the work done by the gas ?19 Apr, 2026 (M)First Law and Basic Fundamentals of Thermodynamics
  7. 7A gas absorbs J of heat and expands by against a constant external pressure of . What will be the change in internal energy of the system ?19 Apr, 2026 (M)First Law and Basic Fundamentals of Thermodynamics
  8. 8Identify from following, the relation between standard free energy change in a reaction and equilibrium constant .19 Apr, 2026 (M)Third law of thermodynamics
  9. 9Which from following is NOT a state function ?19 Apr, 2026 (E)System and surrounding
  10. 10Calculate the work done for the following reaction at ( )19 Apr, 2026 (E)First Law and Basic Fundamentals of Thermodynamics
  11. 11Calculate standard Gibbs energy for any gaseous reaction if values of and respectively are ;19 Apr, 2026 (E)Third law of thermodynamics
  12. 12Which from following is correct expression of first law of thermodynamics for isothermal process?18 Apr, 2026 (M)First Law and Basic Fundamentals of Thermodynamics
  13. 13For a certain reaction, and . Find the temperature so that18 Apr, 2026 (M)Third law of thermodynamics
  14. 14Calculate for the following reaction at if for the reaction is ( )18 Apr, 2026 (M)First Law and Basic Fundamentals of Thermodynamics
  15. 15Calculate the standard enthalpy change for the following reaction, Given,18 Apr, 2026 (E)Laws of Thermochemistry and Enthalpy Change
  16. 16Which of the following is the correct expression of the first law of thermodynamics for adiabatic processes ?18 Apr, 2026 (E)First Law and Basic Fundamentals of Thermodynamics
  17. 171 mole of an ideal gas is compressed isothermally and reversibly from initial pressure kPa to final pressure kPa at 300 K. Find the work don18 Apr, 2026 (E)First Law and Basic Fundamentals of Thermodynamics
  18. 18At standard enthalpy of combustion of , Cyclohexene and cyclohexane are -241, -3800 and -3920 kJ respectively. What is the heat of hydrogena17 Apr, 2026 (M)Laws of Thermochemistry and Enthalpy Change
  19. 19A system is provided 50 J of heat and work done on the system is 10 J. What is change in internal energy ?17 Apr, 2026 (M)First Law and Basic Fundamentals of Thermodynamics
  20. 20Which of the following equations is used to obtain enthalpy change of a reaction?17 Apr, 2026 (M)Laws of Thermochemistry and Enthalpy Change
  21. 21Which of the following processes is an endothermic ?17 Apr, 2026 (E)Laws of Thermochemistry and Enthalpy Change
  22. 22Calculate the standard enthalpy of combustion of carbon monoxide if17 Apr, 2026 (E)Laws of Thermochemistry and Enthalpy Change
  23. 23Calculate the quantity of heat released from system when 2 moles of and ideal gas compressed isothermally from volume to at constant externa17 Apr, 2026 (E)First Law and Basic Fundamentals of Thermodynamics
  24. 24Which of the following relations is correct for a reaction ?16 Apr, 2026 (M)First Law and Basic Fundamentals of Thermodynamics
  25. 25In a particular reaction, 4 kJ heat is released by the system and 12 kJ work done on the system. Calculate the and .16 Apr, 2026 (M)First Law and Basic Fundamentals of Thermodynamics
  26. 26What is the change in entropy of surrounding for the reaction, at 298 K if standard enthalpy of formation of water is kJ ?16 Apr, 2026 (M)Laws of Thermochemistry and Enthalpy Change
  27. 27Identify the process that proceeds with no heat exchange between system and surrounding.16 Apr, 2026 (E)First Law and Basic Fundamentals of Thermodynamics
  28. 28Calculate the enthalpy change when 6 g. reacts with sufficient according to the following reaction16 Apr, 2026 (E)Laws of Thermochemistry and Enthalpy Change
  29. 29The heat of combustion of carbon to is . The heat released upon formation of 35.2 g of from carbon and oxygen gas is16 Apr, 2026 (E)Laws of Thermochemistry and Enthalpy Change
  30. 30Which of the following statements is not correct ?16 Apr, 2026 (E)Third law of thermodynamics
  31. 31Which of the following properties of a system depends upon the amount of matter and path?15 Apr, 2026 (M)System and surrounding
  32. 32Which of the following processes has negative?15 Apr, 2026 (M)Entropy and Second law of thermodynamics
  33. 33The value of enthalpy change ( ) for above reaction at is kJ . Then value of internal energy change for the same reaction at this temperatur15 Apr, 2026 (M)First Law and Basic Fundamentals of Thermodynamics
  34. 34For a reaction to be spontaneous at all temperatures, the values of enthalpy change and entropy change should be15 Apr, 2026 (E)Third law of thermodynamics
  35. 35For a certain reaction, is kJ and is . At what temperature the change over from spontaneous to nonspontaneous will occur?15 Apr, 2026 (E)Entropy and Second law of thermodynamics
  36. 36Calculate the enthalpy change of the reaction, if bond energies (kJ mol ): H–H = 436, Cl–Cl = 242, H–Cl = 43113 Apr, 2026 (M)Laws of Thermochemistry and Enthalpy Change
  37. 37For a certain reaction kJ and J/K find the temperature so that the reaction is spontaneous.13 Apr, 2026 (M)Entropy and Second law of thermodynamics
  38. 38In which of the following processes the internal energy of system remain constant?13 Apr, 2026 (E)First Law and Basic Fundamentals of Thermodynamics
  39. 39A gas expands from a volume of dm to dm under a pressure of bar. Find the change in internal energy if J of heat is supplied to the system.13 Apr, 2026 (E)First Law and Basic Fundamentals of Thermodynamics
  40. 40The enthalpy of combustion of cyclohexane, cyclohexene and are respectively and KJ mol . The enthalpy of hydrogenation of cyclohexene is13 Apr, 2026 (E)Laws of Thermochemistry and Enthalpy Change
  41. 41Which of the following processes exhibits, ?11 Apr, 2026 (M)First Law and Basic Fundamentals of Thermodynamics
  42. 42Calculate the work done when mole of an ideal gas is expanded reversibly and isothermally from initial pressure bar to final pressure bar at11 Apr, 2026 (M)First Law and Basic Fundamentals of Thermodynamics
  43. 43Calculate the enthalpy change for the following reaction, using given bond energy (kJ/mol) (C-H = , H-O = , H-Cl = , C-Cl = and C-O = )11 Apr, 2026 (M)Laws of Thermochemistry and Enthalpy Change
  44. 44The bond dissociation enthalpy of , and HCl are , and kJ respectively. Calculate the enthalpy of formation of HCl.11 Apr, 2026 (E)Laws of Thermochemistry and Enthalpy Change
  45. 45The equilibrium constant for a reaction is . What will be the value of standard Gibbs energy change at K ? ( J )11 Apr, 2026 (E)Third law of thermodynamics
  46. 46Calculate the work done in the oxidation of one mole at , according to reaction.05 May, 2025 (E)First Law and Basic Fundamentals of Thermodynamics
  47. 47Which from following is an example of an intensive property of the system?05 May, 2025 (E)System and surrounding
  48. 48For a certain reaction and . Find the temperature so that is zero.05 May, 2025 (E)Third law of thermodynamics
  49. 49Which of the following processes occurs in the reaction given below27 Apr, 2025 (E)Laws of Thermochemistry and Enthalpy Change
  50. 50Calculate the work done in kJ when 3 moles of an ideal gas at expand isothermally and reversibly from 10 atm . to27 Apr, 2025 (E)First Law and Basic Fundamentals of Thermodynamics

Frequently Asked Questions

1.How many questions are available for Thermodynamics (C)?

This chapter includes 322 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 (C) chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.

3.Is Thermodynamics (C) an important chapter for MHTCET Chemistry?

Thermodynamics (C) has appeared in 17 of the 17 years of MHTCET papers covered here, with 322 questions across 107 papers - about 3 per paper it appears in.

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

Of the 322 questions analysed for this chapter, 44% are easy, 48% moderate and 7% tough. 2025 had the most, with 48 questions.

5.Which topics in Thermodynamics (C) should I focus on?

These topics have carried the most weightage in Thermodynamics (C):

  • First Law and Basic Fundamentals of Thermodynamics - 157 questions (49%)
  • Laws of Thermochemistry and Enthalpy Change - 104 questions (32%)
  • Third law of thermodynamics - 22 questions (7%)
  • First Law and Basic Fundamentals of Thermodynamics has produced the most tough questions (11).
6.Is Thermodynamics (C)'s weightage in MHTCET going up or down?

Across all 107 papers analysed, Thermodynamics (C) has averaged about 3.0 questions per paper. In the last three years (2024–2026), that average has fallen, at about 2.4 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.