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Class 11 Physics — Chapter 12: Thermodynamics Online Test

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Class 11 Physics: Thermodynamics Online Test (Paper 1)

Welcome to Paper 1! This is your foundation to build confidence and get you ready to tackle the challenges ahead.

  • Total Questions: 20
  • Time Allotted: 30 minutes
  • Passing Score: 40%
  • Randomization: No
  • Certificate: No
  • Retake: Allowed
  • Price: 100% Free

Good luck! 👍

1 / 20

1. The relation is called:

2 / 20

2. Maxwell’s relation expresses relationship between:

3 / 20

3. The entropy change of surroundings during a reversible adiabatic process is:

4 / 20

4. Why can no real engine achieve Carnot efficiency?

5 / 20

5. A heat engine absorbs 2000 J of heat at 500 K and rejects 1500 J at 300 K. Does it violate the Second Law?

6 / 20

6. If a refrigerator has a COP of 4, what does it mean?

7 / 20

7. The Brayton cycle is used in:

8 / 20

8. The constant in Van der Waals equation accounts for:

9 / 20

9. A 100 g piece of steam at is passed into 500 g of water at . Find the final temperature when equilibrium is reached. (Latent heat of vaporization = , ).

10 / 20

10. A heat engine absorbs from a source at and rejects to the sink. Find its efficiency.

11 / 20

11. A system absorbs of heat and performs of work. Which statement is correct?

12 / 20

12. Which law of thermodynamics introduces the concept of temperature?

13 / 20

13. Which law of thermodynamics sets the ultimate limit for the efficiency of heat engines?

14 / 20

14. Why is the Zeroth Law significant in thermodynamics?

15 / 20

15. Convert into Kelvin.

16 / 20

16. A system does of work on surroundings and its internal energy decreases by . How much heat was supplied?

17 / 20

17. If a system absorbs of heat and its internal energy increases by , how much work has the system done?

18 / 20

18. Two bodies with masses and , specific heats and , and initial temperatures and , are brought in thermal contact. The final equilibrium temperature is given by:

19 / 20

19. A resistance thermometer works on the principle that:

20 / 20

20. Two objects with heat capacities and are at 500 K and 300 K respectively. What is the final equilibrium temperature?

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Class 11 Physics: Thermodynamics Online Test (Paper 2)

Welcome to Paper 2! You’ve mastered the basics, and now it’s time to test your understanding with a more challenging set of questions.

Get new questions on each attempt

  • Total Questions: 30
  • Time Allotted: 45 minutes
  • Passing Score: 50%
  • Randomization: Yes
  • Certificate: No
  • Retake: Allowed
  • Price: 100% Free

Good luck! 👍

1 / 30

1. If a refrigerator has a COP of 4, what does it mean?

2 / 30

2. Which statement best summarizes the applications of Carnot efficiency?

3 / 30

3. A refrigerator transfers heat from 270 K space to 300 K surroundings. Which law governs this requirement of external work?

4 / 30

4. A gas absorbs of heat and its internal energy increases by . How much work did it do?

5 / 30

5. Which cycle is commonly used in aircraft gas turbines?

6 / 30

6. A Carnot engine takes in 1000 J of heat at 500 K and rejects heat at 300 K. Calculate the work output.

7 / 30

7. When an ice cube is placed in a glass of water, the system reaches thermal equilibrium when:

8 / 30

8. Entropy change of the universe in a reversible process is:

9 / 30

9. Which of the following correctly converts 0 °C into Fahrenheit?

10 / 30

10. A heat engine absorbs of heat from a source and rejects to the sink. What is the work output?

11 / 30

11. Convert into Kelvin.

12 / 30

12. A Carnot refrigerator working between 270 K and 300 K extracts 540 J of heat from the cold reservoir. Find the work input required.

13 / 30

13. In an adiabatic process, the PV curve is:

14 / 30

14. The Kelvin scale is defined by which zero reference point?

15 / 30

15. Which physical property equalizes between two systems in thermal equilibrium?

16 / 30

16. In thermodynamics, which of the following is a path function?

17 / 30

17. A reversible Carnot engine has efficiency 40% when operating between reservoirs at 500 K and . Find the sink temperature.

18 / 30

18. If a gas at pressure occupies volume , calculate the work done when volume increases to at constant pressure.

19 / 30

19. A Carnot engine works between 800 K and 400 K. Its efficiency is:

20 / 30

20. A Carnot engine operates between 600 K and 300 K. If it absorbs 1200 J of heat, how much work does it deliver?

21 / 30

21. A gas expands isothermally at 300 K from 2 L to 6 L. Calculate the work done by 1 mole of gas. (Take ).

22 / 30

22. Why is entropy important in heat transfer processes?

23 / 30

23. If the number of microstates of a system doubles, the entropy change is:

24 / 30

24. The SI unit of entropy is:

25 / 30

25. Which of the following best describes a refrigerator in thermodynamic terms?

26 / 30

26. A Carnot engine operates between a source at 700 K and a sink at 350 K. Find its efficiency.

27 / 30

27. A gas undergoes a reversible heating process where . If , find the entropy change for 2 moles.

28 / 30

28. The entropy change of the universe in any real adiabatic process is:

29 / 30

29. Entropy change for mixing two different ideal gases is:

30 / 30

30. Entropy change of an ideal gas can also be written in terms of and as:

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Class 11 Physics: Thermodynamics Online Test (Paper 3)

Welcome to Paper 3! You’ve warmed up—now it's time to step up your game and conquer the challenge with tougher questions!

Earn a certificate upon passing

Get new questions with every attempt

  • Total Questions: 50
  • Time Allotted: 75 minutes
  • Passing Score: 70%
  • Randomization: Yes
  • Certificate: Yes
  • Retake: Allowed
  • Price: 100% Free

Good luck! 👍

1 / 50

1. Which of the following is an application of equations of state in engineering?

2 / 50

2. A refrigerator extracts of heat from its cold body and requires of work input. What is its coefficient of performance (COP)?

3 / 50

3. The Carnot engine is based on the principle of:

4 / 50

4. The entropy of the universe during a reversible cycle:

5 / 50

5. Which condition is essential for a thermometer to correctly measure body temperature?

6 / 50

6. A system undergoes a reversible isothermal expansion at 350 K, absorbing 3500 J of heat. Calculate entropy change of system, surroundings, and universe.

7 / 50

7. Which cycle is used as a practical alternative to Carnot in gas turbine power plants?

8 / 50

8. A refrigerator absorbs 1200 J of heat from the cold reservoir and requires 400 J of work input. Find its COP.

9 / 50

9. A bullet of mass 0.02 kg is moving at 200 m/s. What is its kinetic energy?

10 / 50

10. A gas at has pressure . If temperature is increased to at constant volume, what will be the final pressure?

11 / 50

11. Entropy is related to probability as:

12 / 50

12. If the number of microstates of a system doubles, the entropy change is:

13 / 50

13. In an adiabatic process, the PV curve is:

14 / 50

14. The Celsius scale is calibrated such that:

15 / 50

15. Why is the Carnot engine considered idealized?

16 / 50

16. In a reversible isothermal compression of an ideal gas from 4 L to 2 L at 300 K with 1 mole, calculate entropy change.

17 / 50

17. Which among the following is not a state variable?

18 / 50

18. The basic principle of a heat engine is:

19 / 50

19. Which of the following is the best example of the Zeroth Law in action?

20 / 50

20. In practice, why must a heat engine always reject some heat to a sink?

21 / 50

21. A Carnot heat pump operates between 280 K (inside) and 320 K (outside). If it consumes 1000 J of work, find the heat delivered to the room.

22 / 50

22. The Kelvin scale is defined by which zero reference point?

23 / 50

23. A heat engine absorbs from a source at and rejects to the sink. Find its efficiency.

24 / 50

24. Entropy change for mixing two different ideal gases is:

25 / 50

25. One mole of an ideal gas at STP occupies:

26 / 50

26. A gas expands adiabatically and does of work. What is the change in internal energy?

27 / 50

27. On the Celsius scale, what are the two fixed reference points traditionally used for calibration?

28 / 50

28. The gas constant has the value:

29 / 50

29. Maxwell’s relations are derived from which thermodynamic principle?

30 / 50

30. The Otto cycle is the idealized cycle for:

31 / 50

31. A steam turbine in a thermal power plant produces 2000 kJ of work while receiving 5000 kJ of heat from the boiler. Calculate its efficiency.

32 / 50

32. Which of the following fields heavily applies thermodynamic principles?

33 / 50

33. The working substance in a heat engine is:

34 / 50

34. The Carnot cycle consists of which processes?

35 / 50

35. Which of the following is a correct statement about entropy change in an isolated system according to the Second Law?

36 / 50

36. A 2 kg block of copper (specific heat capacity ) at 500 K is placed in contact with a 1 kg block of aluminum (specific heat capacity ) at 300 K, in an insulated system. Find the final equilibrium temperature.

37 / 50

37. Who is considered the “Father of Thermodynamics” for laying the foundation of the subject?

38 / 50

38. Which of the following is an irreversible process?

39 / 50

39. One mole of an ideal monoatomic gas is heated at constant volume. If its temperature rises from to , calculate the change in internal energy. (Take ).

40 / 50

40. Temperature is defined as:

41 / 50

41. A calorimeter contains 250 g of water at . A 100 g piece of metal at is placed in it. Final equilibrium temperature is . Find the specific heat of the metal. (Specific heat of water = ).

42 / 50

42. Maxwell’s relations are particularly useful because they:

43 / 50

43. Why is the concept of thermal equilibrium important in defining temperature?

44 / 50

44. A Carnot engine has efficiency 40% when operating between 500 K and . Find the sink temperature.

45 / 50

45. One mole of an ideal gas expands isothermally at 400 K from 2 L to 20 L. Calculate the work done and entropy change. (Take ).

46 / 50

46. A reversible engine rejects 600 J of heat to a sink at 300 K. If its efficiency is 40%, what is the temperature of the source?

47 / 50

47. Which physical property equalizes between two systems in thermal equilibrium?

48 / 50

48. Why are all natural processes considered irreversible?

49 / 50

49. A 200 g block of copper at is placed in 100 g of water at . If the specific heat of copper is and water is , the equilibrium temperature is approximately:

50 / 50

50. The efficiency of a Carnot engine between 800 K and 300 K is:

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Practice Thermodynamics MCQs
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Class 11 Physics — Chapter 12: Thermodynamics Online Test

The Thermodynamics Online Test for Class 11 Physics is designed to help students deeply understand one of the most fundamental and concept-driven chapters in Physics. Thermodynamics connects heat, energy, and work — and forms the foundation for many advanced topics in Physics, Chemistry, and Engineering. Through this chapter-wise MCQ online test, you’ll strengthen your grasp on first law of thermodynamics, heat engines, specific heat, and Carnot’s theorem while preparing for both board and entrance exams.

These tests are based on the NCERT Class 11 Physics Chapter 12 — Thermodynamics and follow the latest CBSE pattern. Each test paper offers an interactive and time-bound experience with instant scoring and detailed answer review. Whether you’re preparing for CBSE exams, JEE, or NEET, this test helps you master every key formula, concept, and application related to thermodynamic systems and processes.

This Thermodynamics Online Test helps students build conceptual clarity through real exam-style problems. Each question is designed to test your understanding of energy transformation, cyclic processes, and heat transfer mechanisms. After every attempt, you can review your answers, identify weak areas, and reattempt to improve your score and confidence.

About this Online Test

The Thermodynamics Online Test includes three structured papers, each tailored for different learning levels. From basic laws to advanced calculations, every paper is a step toward mastering this chapter.

  • Paper 1 — Concept Foundation: 20 questions · 30 min · Pass ≥ 40%
  • Paper 2 — Mixed Practice: 30 questions · 45 min · Pass ≥ 50% · New set each attempt
  • Paper 3 — Advanced Challenge: 50 questions · 75 min · Pass ≥ 70% · Certificate after pass

Each paper is automatically evaluated and includes an answer review section. Papers 2 and 3 shuffle new MCQs every time for diverse practice, while Paper 1 remains fixed for conceptual revision.

Key Topics Covered (Thermodynamics)

  • Thermal equilibrium and Zeroth law of thermodynamics
  • Work, heat, and internal energy
  • First law of thermodynamics and its applications
  • Specific heats — Cp, Cv, and their relationship
  • Isothermal, adiabatic, cyclic, and reversible processes
  • Second law of thermodynamics and heat engines
  • Carnot cycle and efficiency of heat engines
  • Practical applications of thermodynamics in daily life

Why You Should Take This Test

Thermodynamics can feel abstract when studied theoretically, but when solved through problems, the concepts become easier and more meaningful. This online test helps you:

  • Understand energy conservation through problem-solving
  • Revise core laws and processes step by step
  • Build problem-solving confidence under time pressure
  • Track your accuracy with instant grading
  • Prepare for board, JEE, and NEET exams simultaneously

Who Should Attempt This Test

  • Class 11 CBSE/NCERT students revising Chapter 12
  • JEE and NEET aspirants aiming to master thermodynamics fundamentals
  • Students who struggle with conceptual understanding of energy and heat transfer
  • Teachers who want readymade online chapter-wise test papers

Preparation Tips for Chapter 12 — Thermodynamics

  • Understand all four laws of thermodynamics and their meanings.
  • Derive and remember relations between Cp and Cv.
  • Practice numerical questions on work done in isothermal and adiabatic processes.
  • Study the Carnot engine and efficiency formula carefully.
  • Attempt each test sequentially: start from Paper 1, and move to Paper 3 for final evaluation.

Before You Start

  • Use updated Chrome or Edge browser for smooth performance.
  • Ensure a stable internet connection during the test.
  • Do not refresh or close the tab while attempting.

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