Exam-Style Online Test | Class 11 Chemistry: Thermodynamics
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Class 11 Chemistry — Chapter 6: Thermodynamics Online Test

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Class 11 Chemistry: 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. Using formation enthalpies , , , compute for .

2 / 20

2. One mole of an ideal gas expands isothermally and reversibly at 300 K from 5.0 L to 15.0 L. What is the work done by the gas?

3 / 20

3. The second law of thermodynamics can be expressed in terms of entropy as:

4 / 20

4. Which condition represents equilibrium between spontaneous and non-spontaneous behavior?

5 / 20

5. Which of the following statements is correct about average bond enthalpy?

6 / 20

6. The enthalpy of formation of CO₂ is –393.5 kJ/mol and that of CO is –110.5 kJ/mol. What is the enthalpy change for oxidation of CO to CO₂?

7 / 20

7. For the reaction , the heat of neutralization is approximately:

8 / 20

8. If for air, what is ?

9 / 20

9. What is the difference between specific heat capacity and molar heat capacity?

10 / 20

10. Which statement about enthalpy is correct?

11 / 20

11. Which pair below includes only state functions?

12 / 20

12. Which of the following correctly differentiates extensive from intensive properties?

13 / 20

13. During the compression of a gas in a closed cylinder, which of the following statements is true?

14 / 20

14. In thermodynamics, which statement about a closed system is always true?

15 / 20

15. In an isothermal process, which of the following remains constant?

16 / 20

16. In thermodynamics, what are state variables?

17 / 20

17. In the equation , a negative value of ( w ) indicates that:

18 / 20

18. When a system absorbs heat, the sign of q according to chemistry convention is:

19 / 20

19. In the equation , what does each term represent?

20 / 20

20. Consider the reaction: . The standard enthalpy of formation of water is –286 kJ mol⁻¹. What is ΔH°rxn?

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Class 11 Chemistry: 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. When a system releases 350 J of heat and has 150 J of work done on it, what is the change in internal energy?

2 / 30

2. Which of the following statements about standard enthalpy of reaction is correct?

3 / 30

3. Which setup is the best example of a closed system?

4 / 30

4. Which of the following systems has zero entropy at 0 K according to the third law of thermodynamics?

5 / 30

5. What happens during heat transfer between a system and surroundings?

6 / 30

6. Why is it impossible to reach absolute zero temperature?

7 / 30

7. Which property remains intensive when two different liquids at the same temperature and pressure are carefully layered without mixing?

8 / 30

8. Which of the following pairs of molecules shows greater stability based on bond enthalpy?

9 / 30

9. Which statement correctly distinguishes intensive from extensive properties?

10 / 30

10. Why can the third law be used to determine absolute entropies experimentally?

11 / 30

11. One mole of an ideal gas expands isothermally and reversibly at 300 K from 5.0 L to 15.0 L. What is the work done by the gas?

12 / 30

12. Which of the following pairs of processes are always exothermic?

13 / 30

13. For the reaction , the heat of neutralization is approximately:

14 / 30

14. For a reaction with and , the process will be spontaneous when:

15 / 30

15. Which of the following equations relates Gibbs free energy to maximum work?

16 / 30

16. Which of the following best explains why density is intensive while mass is extensive?

17 / 30

17. Which of the following compounds has the highest lattice enthalpy?

18 / 30

18. Which of the following pairs contains only extensive properties?

19 / 30

19. Which statement best defines a closed system?

20 / 30

20. Which of the following conditions leads to zero pressure–volume work?

21 / 30

21. Which transformation converts an extensive property into an intensive one?

22 / 30

22. A closed system is one in which:

23 / 30

23. Which of the following has the greatest increase in entropy?

24 / 30

24. A standard Gibbs energy change ΔG° is most directly related to which equilibrium quantity at 298 K?

25 / 30

25. Which of the following equations correctly represents the standard enthalpy of formation of ammonia?

26 / 30

26. For a solute A in solution, the standard chemical potential μ°A corresponds to which condition?

27 / 30

27. When one mole of ideal gas is heated at constant volume from to , the relation between and is:

28 / 30

28. What does a higher bond enthalpy indicate about the stability of a molecule?

29 / 30

29. When two isolated systems are brought in contact and allowed to interact, the combined system:

30 / 30

30. What is the general thermodynamic criterion for spontaneity of a process at constant temperature and pressure?

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Class 11 Chemistry: 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 value of for a monoatomic ideal gas is:

2 / 50

2. The boundary of a thermos flask containing hot tea can be considered as:

3 / 50

3. For an adiabatic process, what is the value of ( q )?

4 / 50

4. The heat of atomization of water is the energy required for which transformation?

5 / 50

5. Why is entropy (S) considered a state function?

6 / 50

6. A closed system with adiabatic walls is compressed so that 800 J of work is done on the system. The heat transfer is zero. What is ?

7 / 50

7. The third law of thermodynamics is useful in calculating which of the following?

8 / 50

8. During the compression of a gas in a closed cylinder, which of the following statements is true?

9 / 50

9. The standard heat of combustion of ethane (C₂H₆) is –1560 kJ mol⁻¹. What does the negative sign indicate?

10 / 50

10. If a chemical reaction has ΔH = –150 kJ and ΔS = +0.1 kJ/K, what will be the sign of ΔG at 298 K?

11 / 50

11. Which statement about standard state for a gas is correct in this context?

12 / 50

12. Which of the following is an extensive property?

13 / 50

13. What happens to the work done when a gas expands against zero external pressure (vacuum)?

14 / 50

14. Which statement about temperature, pressure, and density is correct?

15 / 50

15. Which of the following statements about entropy at 0 K is true?

16 / 50

16. What is the entropy change of the universe for a reversible process?

17 / 50

17. Which of the following correctly describes the boundary between system and surroundings?

18 / 50

18. For a chemical reaction involving gases, which equation relates ΔH and ΔU?

19 / 50

19. What is the term used for the remaining entropy in a substance due to disorder at 0 K?

20 / 50

20. Why is lattice enthalpy important in thermodynamics?

21 / 50

21. What is the unit of molar heat capacity in SI system?

22 / 50

22. Which of the following correctly expresses the entropy at 0 K for a perfect crystal?

23 / 50

23. Which of the following equations represents an adiabatic process?

24 / 50

24. Which expression links enthalpy change of an ideal gas to temperature at constant pressure?

25 / 50

25. The overall heat of solution (ΔHsol) can be expressed as:

26 / 50

26. The third law of thermodynamics provides a method to determine which of the following?

27 / 50

27. Which of the following represents a decrease in entropy?

28 / 50

28. Why are industrial chemical reactors considered open systems?

29 / 50

29. What does the ratio represent?

30 / 50

30. What is meant by an adiabatic process?

31 / 50

31. What is entropy a measure of?

32 / 50

32. If ΔH = –100 kJ and ΔS = +200 J/K, at what temperature does the reaction become spontaneous?

33 / 50

33. Which of the following processes involves heat transfer but no work done?

34 / 50

34. Why does the absolute entropy of a perfect crystal become zero at 0 K?

35 / 50

35. Which device operates based primarily on heat transfer between two bodies?

36 / 50

36. For a reaction with and , above what temperature will it be spontaneous?

37 / 50

37. In thermodynamics, what does the term "work" refer to?

38 / 50

38. What happens to the internal energy of an ideal gas during an isothermal process?

39 / 50

39. If a system is divided into two equal halves, what happens to its total energy, assuming no interaction between the halves?

40 / 50

40. Which factor affects the bond enthalpy of a molecule?

41 / 50

41. Which of the following is a spontaneous process at room temperature?

42 / 50

42. A process in which heat absorbed by the system is used entirely to do work results in:

43 / 50

43. Internal energy (U) is considered a state function because:

44 / 50

44. Which of the following statements about extensive properties is true?

45 / 50

45. The third law of thermodynamics helps explain which experimental observation?

46 / 50

46. Which of the following is an example of a state function that can be derived from path functions?

47 / 50

47. Which statement about enthalpy is correct?

48 / 50

48. Why is the third law useful in cryogenic studies (very low-temperature research)?

49 / 50

49. What happens during heat transfer between a system and surroundings?

50 / 50

50. For a closed system at constant pressure, the heat exchanged is related to enthalpy by which expression?

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Practice Thermodynamics MCQs
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Class 11 Chemistry — Chapter 6: Thermodynamics Online Test

The Class 11 Chemistry: Chapter 6 – Thermodynamics Online Test provides a comprehensive pool of 395 MCQs designed to evaluate your understanding of the core principles of thermodynamics. This test is free, aligned with the NCERT/CBSE Class 11 syllabus, and offers unlimited practice opportunities to help you master thermodynamic concepts. With three levels of difficulty, you can gradually increase the challenge and track your progress.

Whether you are preparing for school exams or competitive tests like JEE/NEET, this online test will guide you through the key concepts of thermodynamics, from energy conservation to the laws governing thermodynamic processes. This test works as both a revision tool and a mock exam to enhance your speed, accuracy, and conceptual clarity.

Feeling a bit anxious before your exams? Don’t worry, this page is here to help. It’s like a mock test for you to practice at your own pace—whether at home or on the go. With each attempt, you’ll see your score, get instant feedback, and learn from the mistakes. When you’re ready, challenge yourself with Paper 3 for a higher level of difficulty and earn a certificate.

What is the Class 11 Chemistry: Thermodynamics Online Test?

This page contains three exam-style MCQ papers for Chapter 6: Thermodynamics:

  • Paper 1 (Easy) — Foundation: 20 questions · 30 min · Pass 40% · Fixed set
  • Paper 2 (Medium) — Mixed: 30 questions · 45 min · Pass 50% · Randomized from a pool of ~395 questions
  • Paper 3 (Hard) — Challenge: 50 questions · 75 min · Pass 70% · Randomized from the same pool + Certificate on pass

Note: Paper 2 and Paper 3 are randomized, ensuring a new set of questions on each attempt. All papers are timed, auto-evaluated, and show your score with detailed answer reviews.

Topics Covered in this Online Test

This online test covers a wide range of topics in Thermodynamics from the NCERT Class 11 Chemistry syllabus. The following topics are included:

  • Introduction to Thermodynamics — Definition, system, surroundings, and types of systems
  • First Law of Thermodynamics — Internal energy, heat, work, and the concept of energy conservation
  • Enthalpy — Enthalpy changes, heat capacity, and Hess’s Law
  • Work and Heat — Types of work, heat exchange in different processes (isothermal, adiabatic)
  • Thermodynamic Processes — Isothermal, adiabatic, isobaric, isochoric processes
  • Second Law of Thermodynamics — Entropy, spontaneous processes, and reversibility
  • Gibbs Free Energy — Criteria for spontaneity, Gibbs free energy change (ΔG)
  • Heat Engines and Refrigerators — Carnot engine, efficiency, and refrigerator working
  • Entropy and its significance — Entropy as a measure of disorder, Clausius inequality
  • Thermodynamic Cycles — Carnot cycle, Rankine cycle, efficiency of cycles

For a more detailed understanding, you can refer to: Thermodynamics MCQs and explore more questions from Class 11 Chemistry MCQ Collection.

How This Exam-Style Online Test Works

Quick Summary: Select a paper → answer MCQs within the given time → submit → instantly see your score and review your answers. Achieve a passing score on Paper 3 to earn a certificate.

What you’ll see during the test

  • MCQs: One question with four options (A, B, C, D).
  • Timer on top: P1: 30 min • P2: 45 min • P3: 75 min.
  • Pagination: Typically 10 questions per page (navigate through using page controls).
  • Navigation: Use Next/Prev buttons or the question map to revisit questions before submission.
  • View Result: After submitting, click View Result to see your score, correct answers, and mistakes.
  • Restart: Click Restart Test to retry and improve your score with a fresh set of questions (Paper 2 & Paper 3).

Note: After completing the test, feel free to share your feedback on the result page.

Marking & pass criteria

  • Scoring: +1 for correct answers, 0 for incorrect answers (no negative marking).
  • Passing marks: Paper 1 — 40%, Paper 2 — 50%, Paper 3 — 70%.
  • Randomization: Paper 2 and Paper 3 shuffle questions from a large question pool, so every attempt offers fresh challenges.

Who can take this test?

  • Class 11 CBSE students preparing for midterms, unit tests, or final exams in Chemistry.
  • NEET and JEE aspirants strengthening their understanding of thermodynamics and core concepts.
  • Self-learners and home-schoolers looking for a structured way to practice thermodynamics.
  • Teachers and tutors seeking pre-made assessments for students to test their knowledge.
  • Other boards & countries following similar Chemistry curriculums.

Benefits of this Online Test

  • Real exam experience: Timed MCQs simulate exam conditions, building speed and accuracy.
  • Instant results: See your score right away and review the answers for better understanding.
  • Step-up difficulty: Progress through Paper 1 → Paper 2 → Paper 3 and earn a certificate.
  • Unlimited practice: Practice as many times as you need with randomized questions in Paper 2 & 3.
  • Completely free: No fees, no login required—just unlimited access to test your knowledge.

How This Test Helps You Study More Effectively

  • Step 1 – Concept Check: Start with Paper 1 to check your basic understanding.
  • Step 2 – Reinforcement: Attempt Paper 2 to reinforce your concepts.
  • Step 3 – Challenge: Finish with Paper 3 to test your exam readiness.
  • Step 4 – Review: Examine mistakes, understand explanations, and reattempt missed questions.
  • Step 5 – Retake Smartly: Reattempt after 1–2 days to ensure long-term retention and recall.

Important Notes (Please Read Before You Start)

  • Do not refresh or close the browser tab during the test to avoid session loss.
  • Best experience: Use a stable internet connection and the latest browser version (e.g., Chrome or Edge).
  • Allow cookies / local storage to track your progress and test session.
  • Safety: This test is 100% free—ignore any unsolicited payment requests.

More Practice for Class 11 Chemistry

After completing this online test, continue practicing with our comprehensive set of MCQs for other chapters: Class 11 Chemistry MCQs or practice other chapters from: Class 11 Chemistry Online Test Index.

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