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

2 / 30

2. Which of the following is NOT an example of conservation of energy in action?

3 / 30

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

4 / 30

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

5 / 30

5. The molar heat capacity at constant volume is related to specific heat by:

6 / 30

6. In a PV diagram, the Carnot cycle is represented by:

7 / 30

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

8 / 30

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

9 / 30

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

10 / 30

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

11 / 30

11. Which statement about reversibility is correct?

12 / 30

12. In the equation , what does the term represent?

13 / 30

13. Which experiment directly established the mechanical equivalent of heat?

14 / 30

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

15 / 30

15. One mole of an ideal gas is taken from 300 K, 2 atm to 600 K, 4 atm reversibly. Find the entropy change. (Take ).

16 / 30

16. Work in thermodynamics is defined as:

17 / 30

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

18 / 30

18. Which property is NOT a thermodynamic state variable?

19 / 30

19. 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 = ).

20 / 30

20. In real heat engines, efficiency is always less than Carnot efficiency because:

21 / 30

21. Why is the Zeroth Law crucial for building temperature scales like Celsius and Kelvin?

22 / 30

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

23 / 30

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

24 / 30

24. A thermometer is placed in a liquid at . After some time, the thermometer reads . What does this indicate according to the Zeroth Law?

25 / 30

25. Heat supplied to a system is always considered positive when:

26 / 30

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

27 / 30

27. The function of the condenser in a steam engine is:

28 / 30

28. The Carnot efficiency depends on:

29 / 30

29. In a reversible adiabatic process of an ideal gas, entropy change is:

30 / 30

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

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

2 / 50

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

3 / 50

3. A Carnot engine absorbs 1000 J of heat from a reservoir at 600 K and rejects heat to a sink at 300 K. How much work is produced?

4 / 50

4. The basic principle of a refrigerator is:

5 / 50

5. Which scientist introduced the concept of entropy?

6 / 50

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

7 / 50

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

8 / 50

8. A clinical thermometer is designed to measure human body temperature accurately because:

9 / 50

9. A refrigerator absorbs 600 J of heat from the cold space and rejects 800 J to the surroundings. Find its COP.

10 / 50

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

11 / 50

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

12 / 50

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

13 / 50

13. A heat pump requires 500 J of work to deliver 2000 J of heat to the room. What is its COP?

14 / 50

14. The working substance in a heat engine is:

15 / 50

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

16 / 50

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

17 / 50

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

18 / 50

18. 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 = ).

19 / 50

19. The role of entropy in energy conversion can be summarized as:

20 / 50

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

21 / 50

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

22 / 50

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

23 / 50

23. Entropy is best described as:

24 / 50

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

25 / 50

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

26 / 50

26. Which of the following is NOT a component of a heat engine?

27 / 50

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

28 / 50

28. The device that reduces pressure of the refrigerant before entering the evaporator is called:

29 / 50

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

30 / 50

30. A system has microstates. Calculate its entropy. (Take ).

31 / 50

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

32 / 50

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

33 / 50

33. A gas initially at pressure , volume , and temperature . If it changes to pressure , volume , temperature , which of the following remains unchanged?

34 / 50

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

35 / 50

35. A system absorbs 500 J of heat and does no work. What is the change in internal energy?

36 / 50

36. 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?

37 / 50

37. Convert absolute zero (0 K) into Celsius and Fahrenheit respectively.

38 / 50

38. On a PV diagram, which cycle appears as a rectangle?

39 / 50

39. Which quantity remains constant in an isothermal process?

40 / 50

40. Which Maxwell relation connects entropy with volume and pressure with temperature?

41 / 50

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

42 / 50

42. A car air conditioning system absorbs 10 kJ of heat per cycle from the passenger cabin and requires 2.5 kJ of work input. Find its COP.

43 / 50

43. How many independent Maxwell’s relations exist?

44 / 50

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

45 / 50

45. 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.

46 / 50

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

47 / 50

47. Why is the Zeroth Law called “zeroth” and not the fourth law?

48 / 50

48. Which of the following devices would violate the Second Law if possible?

49 / 50

49. The entropy of an isolated system:

50 / 50

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

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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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