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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 body A is in thermal equilibrium with body B, and body B is in thermal equilibrium with body C, then which law applies?

2 / 30

2. In power plants, thermodynamics is mainly used to:

3 / 30

3. Why are Maxwell’s relations and property relationships important in practice?

4 / 30

4. Temperature is defined as:

5 / 30

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

6 / 30

6. A container of 2 moles of ideal gas expands at constant pressure of from 0.01 m³ to 0.02 m³. Calculate the work done by the gas.

7 / 30

7. In an adiabatic process, heat exchange is:

8 / 30

8. What is the entropy change when 1000 J of heat is absorbed reversibly at 500 K?

9 / 30

9. A reservoir at 500 K supplies 2000 J of heat to a reversible engine. Calculate the entropy change of the reservoir.

10 / 30

10. A 500 g block of aluminum at is mixed with 200 g of water at . If and , calculate the final equilibrium temperature.

11 / 30

11. A piece of iron of mass 500 g at is dropped into 200 g of water at . If and , the equilibrium temperature is closest to:

12 / 30

12. Two objects, A and B, are in thermal equilibrium. Object B is also in thermal equilibrium with object C. According to the Zeroth Law:

13 / 30

13. In an adiabatic process, according to the First Law:

14 / 30

14. A heat pump delivers of heat to a room while consuming of work. What is the COP of the heat pump?

15 / 30

15. Which of the following is not a mechanism of heat transfer?

16 / 30

16. Which of the following is the Kelvin-Planck statement of the Second Law of Thermodynamics?

17 / 30

17. In a power cycle, heat supplied is 3000 J and work obtained is 1200 J. Calculate the entropy generated if the source is at 600 K and the sink at 300 K.

18 / 30

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

19 / 30

19. In heat transfer by conduction, thermal conductivity of water compared to metals is:

20 / 30

20. A Maxwell relation derived from internal energy is:

21 / 30

21. A 200 g block of copper at is dropped into 300 g of water at . If and , find the equilibrium temperature.

22 / 30

22. Which relation is true for a perfect gas?

23 / 30

23. The Maxwell relation derived from Gibbs free energy is:

24 / 30

24. Why is entropy considered a measure of energy quality?

25 / 30

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

26 / 30

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

27 / 30

27. Which component of an air conditioner circulates refrigerant between the condenser and evaporator?

28 / 30

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

29 / 30

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

30 / 30

30. 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 = ).

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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. Temperature is defined as:

2 / 50

2. Why can no real engine achieve Carnot efficiency?

3 / 50

3. Why is the Zeroth Law significant in thermodynamics?

4 / 50

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

5 / 50

5. The historical development of thermodynamics was mainly driven by:

6 / 50

6. The principle of conservation of energy states that:

7 / 50

7. For a reversible adiabatic process of an ideal gas, the relation between temperature and volume is:

8 / 50

8. Which refrigerant was widely used in older air conditioners but phased out due to ozone depletion?

9 / 50

9. Why are property relations between useful in thermodynamics?

10 / 50

10. Why is the Carnot engine considered an "ideal engine"?

11 / 50

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

12 / 50

12. A 1 kg block of iron at 400 K and a 2 kg block of water at 300 K are placed together in an insulated system. If and , the equilibrium temperature is:

13 / 50

13. Internal energy of an ideal monoatomic gas is given by:

14 / 50

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

15 / 50

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

16 / 50

16. One mole of a diatomic ideal gas () is compressed adiabatically from 10 L at 300 K to 5 L. Find the final temperature.

17 / 50

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

18 / 50

18. Which factor must be avoided to ensure accurate calibration of thermometers?

19 / 50

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

20 / 50

20. 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.

21 / 50

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

22 / 50

22. Which of the following is the Clausius statement of the Second Law?

23 / 50

23. What was James Prescott Joule’s key contribution to thermodynamics?

24 / 50

24. Which cycle is commonly used in steam power plants as a practical alternative to Carnot?

25 / 50

25. Which relation is true for a perfect gas?

26 / 50

26. The SI unit of internal energy is:

27 / 50

27. In a refrigerator, the condenser:

28 / 50

28. In a thermal power plant, why is condenser pressure kept very low?

29 / 50

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

30 / 50

30. Entropy change of the universe in an irreversible process is:

31 / 50

31. Which of the following is a limitation of the ideal gas law in modeling real gases?

32 / 50

32. A gas absorbs of heat and does of work. What is the change in internal energy?

33 / 50

33. The efficiency of a Carnot engine approaches 100% when:

34 / 50

34. A system does of work on surroundings and its internal energy decreases by . What is the heat exchange?

35 / 50

35. Why are fixed points like the freezing and boiling points of water important in thermometer calibration?

36 / 50

36. Why are Diesel engines generally more fuel-efficient than petrol engines?

37 / 50

37. Why can’t all absorbed heat energy be converted into work in energy conversion devices?

38 / 50

38. Which relation shows the link between measurable thermal expansion and entropy change?

39 / 50

39. The basic principle of a heat engine is:

40 / 50

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

41 / 50

41. Which of the following represents work transfer in thermodynamics?

42 / 50

42. Entropy in thermodynamics is defined as:

43 / 50

43. In a TS diagram, the area under the curve represents:

44 / 50

44. Which of the following is an example of a reversible process?

45 / 50

45. Internal energy of a system includes:

46 / 50

46. In thermodynamics, what does the term "surroundings" mean?

47 / 50

47. A system undergoes adiabatic compression. What happens to its temperature?

48 / 50

48. Which statement about reversibility is correct?

49 / 50

49. Why is calibration critical in high-precision scientific experiments?

50 / 50

50. The efficiency of a reversible heat engine working between two reservoirs depends on:

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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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