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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

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

2 / 30

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

3 / 30

3. In an isothermal process, which parameter remains constant?

4 / 30

4. Convert into Kelvin.

5 / 30

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

6 / 30

6. Which cycle is used as a practical alternative to Carnot in gas turbine power plants?

7 / 30

7. Why is Carnot’s theorem important in thermodynamic analysis?

8 / 30

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

9 / 30

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

10 / 30

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

11 / 30

11. A heat engine absorbs of heat from a source and rejects to the sink. What is the work output?

12 / 30

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

13 / 30

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

14 / 30

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

15 / 30

15. The practical implication of entropy increase in real thermodynamic systems is:

16 / 30

16. The Boltzmann entropy formula is:

17 / 30

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

18 / 30

18. Which statement is true for all heat engines?

19 / 30

19. A system absorbs of heat and performs of work. Which statement is correct?

20 / 30

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

21 / 30

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

22 / 30

22. A resistance thermometer works on the principle that:

23 / 30

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

24 / 30

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

25 / 30

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

26 / 30

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

27 / 30

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

28 / 30

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

29 / 30

29. Entropy is related to probability as:

30 / 30

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

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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. Which instrument operates on the principle of thermal equilibrium?

2 / 50

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

3 / 50

3. Entropy is significant because it:

4 / 50

4. In an isothermal process, which parameter remains constant?

5 / 50

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

6 / 50

6. A Maxwell relation derived from internal energy is:

7 / 50

7. The principle of a heat pump is:

8 / 50

8. The SI unit of work is:

9 / 50

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

10 / 50

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

11 / 50

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

12 / 50

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

13 / 50

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

14 / 50

14. The significance of the Carnot engine in thermodynamics is that:

15 / 50

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

16 / 50

16. A steam turbine receives steam at 500 °C and exhausts it at 40 °C. If Carnot efficiency is 61%, the actual turbine efficiency is usually:

17 / 50

17. Why can no heat engine have 100% efficiency?

18 / 50

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

19 / 50

19. 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?

20 / 50

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

21 / 50

21. In a refrigerator, the condenser:

22 / 50

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

23 / 50

23. A steam turbine receives 4000 kJ of heat at 600 K and rejects 2500 kJ to a sink at 300 K. Determine the entropy change of the universe.

24 / 50

24. A reversible process is defined as one which:

25 / 50

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

26 / 50

26. A steel rod at is placed in oil at . If both are left long enough, what will happen?

27 / 50

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

28 / 50

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

29 / 50

29. Maxwell’s relations are derived from which thermodynamic principle?

30 / 50

30. The Carnot efficiency depends on:

31 / 50

31. 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 ).

32 / 50

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

33 / 50

33. In a TS diagram, the cycle efficiency can be calculated as:

34 / 50

34. Which temperature is the same numerical value in both Celsius and Fahrenheit scales?

35 / 50

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

36 / 50

36. The Third Law of Thermodynamics states that:

37 / 50

37. Which of the following is an example of a thermodynamic system?

38 / 50

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

39 / 50

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

40 / 50

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

41 / 50

41. 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:

42 / 50

42. Why can no real engine achieve Carnot efficiency?

43 / 50

43. A mole of ideal gas expands isothermally at 300 K from 5 L to 10 L. Calculate the work done. (Take ).

44 / 50

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

45 / 50

45. In a cyclic process, the system returns to its initial state. What is the change in internal energy after one cycle?

46 / 50

46. One mole of an ideal monoatomic gas is heated at constant volume. If its temperature rises from to , calculate the change in internal energy. (Take ).

47 / 50

47. 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 = , ).

48 / 50

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

49 / 50

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

50 / 50

50. In practice, why can’t refrigerators or heat pumps achieve infinite COP as predicted when ?

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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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