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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. Why is calibration of thermometers necessary?

2 / 30

2. For a monoatomic ideal gas, what is the value of ?

3 / 30

3. Which of the following phenomena illustrates the Second Law?

4 / 30

4. A 500 g piece of aluminum () is supplied with of heat. What is the rise in its temperature?

5 / 30

5. The basic principle of a refrigerator is:

6 / 30

6. Entropy is a:

7 / 30

7. Which of the following best describes the role of insulation in achieving thermal equilibrium in experiments?

8 / 30

8. A digital thermometer works on the principle of:

9 / 30

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

10 / 30

10. 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 ).

11 / 30

11. Which of the following is an intensive property among state variables?

12 / 30

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

13 / 30

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

14 / 30

14. Which of the following is correct for an isothermal process involving an ideal gas?

15 / 30

15. In refrigeration systems, the throttling process (expansion valve) is considered irreversible because:

16 / 30

16. The Zeroth Law of Thermodynamics allows us to define:

17 / 30

17. Which process in heat exchangers leads to entropy generation?

18 / 30

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

19 / 30

19. An ideal gas expands isothermally at 400 K from volume 4 L to 12 L. If there are 2 moles of gas, calculate the work done. (Take ).

20 / 30

20. The relation between COP of a refrigerator and heat pump is:

21 / 30

21. The performance of refrigerators and heat pumps is measured in terms of:

22 / 30

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

23 / 30

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

24 / 30

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

25 / 30

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

26 / 30

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

27 / 30

27. Why can no real engine achieve Carnot efficiency?

28 / 30

28. Why is Kelvin preferred in scientific thermodynamics over Celsius or Fahrenheit?

29 / 30

29. Heat in thermodynamics is defined as:

30 / 30

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

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

2 / 50

2. Which property equalizes when two systems are in thermal equilibrium according to the Zeroth Law?

3 / 50

3. Which statement is correct about Carnot efficiency?

4 / 50

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

5 / 50

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

6 / 50

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

7 / 50

7. The principle of calorimetry is based on:

8 / 50

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

9 / 50

9. Which 17th-century scientist first hinted at energy conservation through chemical processes?

10 / 50

10. The ideal gas law is expressed as:

11 / 50

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

12 / 50

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

13 / 50

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

14 / 50

14. Which of the following is correct for an isothermal process involving an ideal gas?

15 / 50

15. A Carnot engine works between a hot reservoir at 900 K and a cold reservoir at 300 K. If it absorbs 1800 J of heat, how much heat is rejected?

16 / 50

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

17 / 50

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

18 / 50

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

19 / 50

19. A mercury thermometer is placed in hot water at . If the thermometer initially reads , what happens over time?

20 / 50

20. Which Maxwell relation directly relates entropy with pressure and volume with temperature?

21 / 50

21. Which of the following applications is directly based on the concept of thermal equilibrium?

22 / 50

22. Which of the following conditions must be ensured for accurate calorimetry measurement?

23 / 50

23. 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.

24 / 50

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

25 / 50

25. The Carnot cycle consists of which processes?

26 / 50

26. Convert into Fahrenheit.

27 / 50

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

28 / 50

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

29 / 50

29. A Carnot engine operates between a source at 600 K and sink at 300 K. Find its efficiency.

30 / 50

30. Which modern technology improves the efficiency of air conditioners and climate control systems?

31 / 50

31. 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.

32 / 50

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

33 / 50

33. A heat engine absorbs of heat and rejects to the sink. Find its efficiency.

34 / 50

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

35 / 50

35. Which process in heat exchangers leads to entropy generation?

36 / 50

36. A heat engine receives of heat and performs of work. What is the heat rejected to the sink?

37 / 50

37. The efficiency of the Carnot engine is independent of:

38 / 50

38. In an isochoric process, the heat supplied is:

39 / 50

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

40 / 50

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

41 / 50

41. Why is thermodynamic modeling essential in chemical engineering?

42 / 50

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

43 / 50

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

44 / 50

44. Which condition ensures accurate temperature measurement using a thermometer?

45 / 50

45. Why can no real engine achieve Carnot efficiency?

46 / 50

46. Why is the Zeroth Law essential for using thermometers in daily life?

47 / 50

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

48 / 50

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

49 / 50

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

50 / 50

50. The SI unit of internal energy 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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