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

Good luck! 👍

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. How does total volume behave when two systems are combined?

2 / 30

2. What is the thermodynamic significance of a negative ΔG value?

3 / 30

3. What does the term "thermodynamics" literally mean?

4 / 30

4. Which of the following pairs correctly shows both path functions?

5 / 30

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

6 / 30

6. Which of the following is an irreversible process?

7 / 30

7. When work is done on the system by the surroundings, its sign according to the chemistry convention is:

8 / 30

8. What happens to the entropy of all pure crystalline solids at 0 K according to the third law?

9 / 30

9. The standard enthalpy of combustion of hydrogen is:

10 / 30

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

11 / 30

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

12 / 30

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

13 / 30

13. Which statement correctly explains why ?

14 / 30

14. Why are standard enthalpies of reaction important in chemistry?

15 / 30

15. What is the SI unit of energy commonly used in thermodynamics?

16 / 30

16. Under which conditions does Gibbs free energy remain constant?

17 / 30

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

18 / 30

18. One mole of an ideal gas undergoes isothermal, reversible compression at 300 K from 10.0 L to 2.0 L. Compute the work on the gas.

19 / 30

19. Which of the following conditions must hold true for a process to be reversible?

20 / 30

20. The SI unit of heat energy is:

21 / 30

21. The heat of atomization of chlorine gas (Cl₂) is 243 kJ/mol. What is the bond dissociation energy of the Cl–Cl bond?

22 / 30

22. What does a high bond enthalpy value indicate about a molecule?

23 / 30

23. The standard enthalpy of reaction can be expressed as:

24 / 30

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

25 / 30

25. What is the SI unit of heat capacity?

26 / 30

26. Which of the following correctly represents the average bond enthalpy of C–H bonds in methane?

27 / 30

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

28 / 30

28. For a reaction at 298 K with and , what is ?

29 / 30

29. Which of the following statements about absolute entropy is true?

30 / 30

30. What is meant by the heat of dilution?

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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. Which of the following correctly summarizes the third law of thermodynamics?

2 / 50

2. What is enthalpy (H) defined as in thermodynamics?

3 / 50

3. Which of the following has the highest bond enthalpy?

4 / 50

4. For a pure liquid, density is classified as which type of property?

5 / 50

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

6 / 50

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

7 / 50

7. During an exothermic reaction at constant pressure, which of the following statements is true?

8 / 50

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

9 / 50

9. Which of the following correctly describes an isothermal expansion of an ideal gas?

10 / 50

10. Which statement best summarizes Hess’s law?

11 / 50

11. During adiabatic expansion of an ideal gas:

12 / 50

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

13 / 50

13. Which property cannot be determined without the third law of thermodynamics?

14 / 50

14. For a diatomic ideal gas, . What is ?

15 / 50

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

16 / 50

16. In thermodynamics, the earth’s atmosphere can be regarded as:

17 / 50

17. What is the absolute entropy of a perfect crystalline solid at 0 K?

18 / 50

18. Which of the following is not a closed system?

19 / 50

19. What is a reversible process in thermodynamics?

20 / 50

20. Which of the following statements about P–V work is true?

21 / 50

21. Why is the bond enthalpy of O=O lower than that of N≡N?

22 / 50

22. Which of the following represents the correct equation for the standard heat of combustion of methane?

23 / 50

23. What is an intensive property in thermodynamics?

24 / 50

24. Which of the following statements about isolated systems is incorrect?

25 / 50

25. In an isolated system, what happens to the total energy?

26 / 50

26. The heat of atomization of chlorine gas (Cl₂) is 243 kJ/mol. What is the bond dissociation energy of the Cl–Cl bond?

27 / 50

27. Which of the following quantities is a state function related to the First Law?

28 / 50

28. The rest of the universe excluding the system is called:

29 / 50

29. If the mass of a system is doubled, how does an extensive property like energy change?

30 / 50

30. If ΔH₁ = –393.5 kJ and ΔH₂ = –283 kJ, what is ΔH for the reaction C(s) + ½O₂(g) → CO(g)?

31 / 50

31. Which of the following best describes Gibbs free energy?

32 / 50

32. Which of the following statements correctly describes heat transfer?

33 / 50

33. Using the data of question 385, if the initial temperature is 300 K, what is the final temperature?

34 / 50

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

35 / 50

35. How does the third law help in calculating entropy changes for chemical reactions?

36 / 50

36. For a monatomic ideal gas, if , what is ?

37 / 50

37. If , which of the following statements must be true?

38 / 50

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

39 / 50

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

40 / 50

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

41 / 50

41. What is the mathematical expression for work done during expansion or compression of a gas at constant external pressure?

42 / 50

42. How can the third law be applied to determine the feasibility of a reaction?

43 / 50

43. During expansion, a gas performs 300 J of work against constant external pressure. What happens to the system’s internal energy if no heat is supplied?

44 / 50

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

45 / 50

45. Why are industrial chemical reactors considered open systems?

46 / 50

46. What is meant by the term heat of hydration?

47 / 50

47. What is the fundamental relation between molar heat capacities at constant pressure and volume for an ideal gas?

48 / 50

48. What is the correct mathematical expression for pressure–volume work done by a gas at constant external pressure?

49 / 50

49. When NaOH pellets dissolve in water, the beaker becomes hot because:

50 / 50

50. What is meant by molar heat capacity?

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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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