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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 500 g block of unknown metal is heated to and placed in 200 g of water at . Final temperature becomes . Find the specific heat of the metal. (Specific heat of water = ).

2 / 30

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

3 / 30

3. Why is the study of entropy important in physical sciences?

4 / 30

4. The entropy change when 2 kg of ice at 0 °C melts to water at 0 °C is (latent heat of fusion ).

5 / 30

5. A 2 mole ideal gas is heated at constant volume from 300 K to 400 K. Find the heat supplied. (For a monoatomic gas, , ).

6 / 30

6. If body A is in thermal equilibrium with body B, and body B with body C, then which parameter is the same for all three according to the Zeroth Law?

7 / 30

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

8 / 30

8. An isothermal process on a PV diagram appears as:

9 / 30

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

10 / 30

10. The Second Law of Thermodynamics introduces the concept of:

11 / 30

11. In an isothermal expansion of an ideal gas, the work done is given by:

12 / 30

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

13 / 30

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

14 / 30

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

15 / 30

15. Which of the following is an application of calorimetry in real life?

16 / 30

16. Which of the following statements best represents the First Law of Thermodynamics?

17 / 30

17. A gas is compressed by doing of work on it. During compression, the gas loses of heat to the surroundings. What is the change in internal energy?

18 / 30

18. The work output of a Carnot cycle is equal to:

19 / 30

19. If the temperature of the sink in a Carnot engine is lowered, its efficiency will:

20 / 30

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

21 / 30

21. A refrigerator extracts 1200 J of heat from the cold space and rejects 1800 J to the surroundings. The work input required is:

22 / 30

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

23 / 30

23. In an adiabatic process for an ideal gas, the relation between pressure and volume is:

24 / 30

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

25 / 30

25. Why is entropy important in heat transfer processes?

26 / 30

26. Why can’t the Carnot cycle be used directly in power plants?

27 / 30

27. Which of the following factors reduces efficiency of real thermodynamic systems?

28 / 30

28. Which of the following is a major limitation of applying Carnot’s cycle in refrigerators?

29 / 30

29. Which of the following represents the efficiency of a heat engine?

30 / 30

30. In combined-cycle power plants, entropy analysis is used to:

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

2 / 50

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

3 / 50

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

4 / 50

4. Which of the following is true for an adiabatic process?

5 / 50

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

6 / 50

6. A body of mass 1 kg is thrown vertically upwards with velocity 20 m/s. Ignoring air resistance, what maximum height will it reach? (Take ).

7 / 50

7. Entropy is best described as:

8 / 50

8. Which statement is correct about Carnot efficiency?

9 / 50

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

10 / 50

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

11 / 50

11. Which of the following processes has zero entropy generation?

12 / 50

12. Which of the following indicates irreversibility in real processes?

13 / 50

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

14 / 50

14. A 0.1 kg piece of iron at is placed in 0.2 kg water at . If and , the final equilibrium temperature is:

15 / 50

15. A Carnot engine operates between a hot reservoir at 900 K and a cold reservoir at 300 K. If it absorbs 6000 J of heat from the hot reservoir, calculate (i) work done, and (ii) heat rejected.

16 / 50

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

17 / 50

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

18 / 50

18. A steel ball of mass 0.2 kg at is dropped into 0.5 kg water at . If and , the equilibrium temperature is:

19 / 50

19. Why is thermodynamic modeling essential in chemical engineering?

20 / 50

20. Which of the following factors reduces efficiency of real thermodynamic systems?

21 / 50

21. In an isobaric process, heat supplied is related to change in enthalpy as:

22 / 50

22. The Second Law differs from the First Law because it:

23 / 50

23. For an ideal gas undergoing an isothermal expansion, entropy change can be expressed as:

24 / 50

24. A thermometer placed in thermal contact with a body shows a steady reading after some time. What does this indicate?

25 / 50

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

26 / 50

26. A practical application of Maxwell’s relation in engineering is:

27 / 50

27. An isothermal process on a TS diagram appears as:

28 / 50

28. A gas expands isothermally from 2 L to 6 L against a piston. If expansion is done reversibly, the work done is:

29 / 50

29. A gas at constant pressure of expands from 0.01 m³ to 0.03 m³. Calculate the work done.

30 / 50

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

31 / 50

31. A black body at 300 K emits radiation energy at a rate of . If its temperature is doubled, the emission rate becomes approximately:

32 / 50

32. For thermal equilibrium to be established, the heat transfer must continue until:

33 / 50

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

34 / 50

34. The basic principle of a heat engine is:

35 / 50

35. In a calorimeter experiment, a hot solid of mass 100 g at is dropped into 200 g of water at . If the final equilibrium temperature is , calculate the specific heat of the solid. (Specific heat of water = ).

36 / 50

36. Calculate the molar specific heat at constant volume () for a diatomic ideal gas at room temperature.

37 / 50

37. The change in entropy () for a reversible process is given by:

38 / 50

38. Which statement is correct regarding COP of real systems?

39 / 50

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

40 / 50

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

41 / 50

41. One mole of a monoatomic ideal gas has . What is ?

42 / 50

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

43 / 50

43. The Otto cycle is the idealized cycle for:

44 / 50

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

45 / 50

45. The entropy change when 2 kg of ice at 0 °C melts to water at 0 °C is (latent heat of fusion ).

46 / 50

46. Which of the following is an application of calorimetry in real life?

47 / 50

47. 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.

48 / 50

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

49 / 50

49. For an irreversible adiabatic process, entropy change of the system is:

50 / 50

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

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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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