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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.

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

Good luck! 👍

1 / 30

1. 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?

2 / 30

2. The efficiency of a heat engine is given by:

3 / 30

3. A digital thermometer works on the principle of:

4 / 30

4. In large buildings, centralized cooling systems often use:

5 / 30

5. Two objects in thermal contact are said to be in equilibrium when:

6 / 30

6. Two bodies at different temperatures are brought into thermal contact. Which direction does heat flow initially?

7 / 30

7. A 100 g piece of metal at is dropped into 200 g of water at . Final temperature is . Calculate the specific heat of the metal. (Specific heat of water = )

8 / 30

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

9 / 30

9. A 50 g ice cube at is dropped into 200 g of water at . Find the final temperature after thermal equilibrium is reached. (Latent heat of fusion of ice = , specific heat of water = ).

10 / 30

10. Convert normal human body temperature into Celsius.

11 / 30

11. In aerospace engineering, thermodynamics is essential for:

12 / 30

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

13 / 30

13. Which principle is the basis of calorimetry?

14 / 30

14. Which of the following is a path function in thermodynamics?

15 / 30

15. A Carnot refrigerator extracts 500 J of heat from a cold reservoir at 270 K and rejects it to a hot reservoir at 300 K. Calculate the work input required.

16 / 30

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

17 / 30

17. The efficiency of a Carnot engine operating between and is:

18 / 30

18. The gas constant has the value:

19 / 30

19. Which mathematical property makes Maxwell’s relations possible?

20 / 30

20. For an isentropic process, the entropy change is:

21 / 30

21. Which of the following best illustrates the significance of the Zeroth Law?

22 / 30

22. Which statement correctly explains entropy change in natural processes?

23 / 30

23. A system absorbs 1200 J of heat reversibly at a constant temperature of 300 K. Calculate the change in entropy.

24 / 30

24. A gas does of work and its internal energy decreases by . Find the heat supplied.

25 / 30

25. A Carnot engine operates between 500 K and 400 K. If it absorbs 1200 J of heat, calculate the work output.

26 / 30

26. The method commonly used in laboratories to measure specific heat capacity is:

27 / 30

27. In climate control systems, why is humidity control important?

28 / 30

28. Which of the following is a correct pair of conjugate state variables?

29 / 30

29. An isobaric process on a PV diagram is represented by:

30 / 30

30. Which of the following is an application of Carnot efficiency in thermodynamic analysis?

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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!

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

Good luck! 👍

1 / 50

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

2 / 50

2. Which of the following processes are part of the Carnot cycle?

3 / 50

3. Which process appears as a vertical line on a TS diagram?

4 / 50

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

5 / 50

5. Entropy is significant because it:

6 / 50

6. A 1 kg block of iron at is placed in 2 kg of water at . If final temperature is , calculate the specific heat of iron. (Specific heat of water = ).

7 / 50

7. Which scientist introduced the concept of entropy?

8 / 50

8. In the Carnot cycle, work is produced during:

9 / 50

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

10 / 50

10. Which thermodynamic device is most directly linked to refrigeration and air conditioning systems?

11 / 50

11. 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.

12 / 50

12. Calibration of thermometers requires reference points. Which two are most commonly used?

13 / 50

13. Which statement about reversibility is correct?

14 / 50

14. The Brayton cycle is used in:

15 / 50

15. A Carnot engine works between reservoirs at 800 K and 400 K. If it absorbs 1200 J of heat per cycle, find the work done and heat rejected.

16 / 50

16. Which law forms the basis of temperature measurement and calibration?

17 / 50

17. Why is thermodynamics important in engineering?

18 / 50

18. For an ideal gas, entropy change with volume at constant temperature is:

19 / 50

19. An ideal gas expands adiabatically from to . (). Find final pressure .

20 / 50

20. Why is the Carnot engine considered a standard of comparison for real engines?

21 / 50

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

22 / 50

22. In an internal combustion engine, the hot source is:

23 / 50

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

24 / 50

24. A room air conditioner extracts 5000 kJ of heat per hour while consuming 1500 kJ of work. Calculate its COP.

25 / 50

25. Thermodynamics is primarily the study of which of the following?

26 / 50

26. Why is the statistical interpretation of entropy significant?

27 / 50

27. A reversible process is defined as one which:

28 / 50

28. A Carnot engine operates between and . If the engine delivers 1200 J of work per cycle, calculate the heat absorbed .

29 / 50

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

30 / 50

30. In convection, heat transfer occurs due to:

31 / 50

31. The Third Law of Thermodynamics states that:

32 / 50

32. Which process is represented by a horizontal line in a PV diagram?

33 / 50

33. Which of the following is a necessary condition for achieving thermal equilibrium between two bodies?

34 / 50

34. Entropy is best described as:

35 / 50

35. Entropy change for an ideal gas in terms of and is:

36 / 50

36. The function of the compressor in a refrigerator is:

37 / 50

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

38 / 50

38. Which of the following best explains the First Law of Thermodynamics?

39 / 50

39. The specific heat capacity of a substance is defined as:

40 / 50

40. Which mathematical property makes Maxwell’s relations possible?

41 / 50

41. Thermodynamics helps in chemical engineering mainly by:

42 / 50

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

43 / 50

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

44 / 50

44. Why is entropy analysis important in practical power cycles?

45 / 50

45. Calculate the maximum work obtained from a Carnot engine operating between 500 K and 300 K when it absorbs 2000 J of heat.

46 / 50

46. Which of the following is true for internal energy?

47 / 50

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

48 / 50

48. Two bodies A and B, with heat capacities and , are initially at and . If they are placed in contact in an isolated system, the final equilibrium temperature is:

49 / 50

49. In a steam engine, the boiler acts as:

50 / 50

50. Which heat transfer process is primarily responsible for sea and land breezes?

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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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