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. 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?

2 / 30

2. Why is the heat of neutralization nearly constant for all strong acid–strong base reactions?

3 / 30

3. What does a positive value of indicate about a process?

4 / 30

4. 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?

5 / 30

5. For an endothermic process to be spontaneous, what must be true?

6 / 30

6. What is true for a system undergoing a spontaneous process at constant temperature and pressure?

7 / 30

7. Two identical containers each hold the same gas at 300 K and 1 atm. If they are combined into one larger container without heat exchange and without changing temperature, which statement is correct?

8 / 30

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

9 / 30

9. The surface separating gas inside a balloon from the external air is a:

10 / 30

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

11 / 30

11. Which of the following is true according to Hess’s law?

12 / 30

12. In a cyclic process where the system returns to its original state, which statement is true?

13 / 30

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

14 / 30

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

15 / 30

15. How can the absolute entropy of a substance at any temperature be calculated using the third law?

16 / 30

16. What is the general relation between enthalpy change (ΔH) and internal energy change (ΔU)?

17 / 30

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

18 / 30

18. Which of the following is the best example of an isolated system?

19 / 30

19. Which of the following reactions is spontaneous at constant temperature and pressure?

20 / 30

20. Which of the following reactions has ΔH° = 0 by definition?

21 / 30

21. In a reaction where Δn = 0 (no change in moles of gas), what can be said about ΔH and ΔU?

22 / 30

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

23 / 30

23. In chemistry, “standard conditions” for thermodynamic data typically refer to which set?

24 / 30

24. Which statement correctly explains why ?

25 / 30

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

26 / 30

26. At 298 K, the equilibrium constant for a reaction is . What is ?

27 / 30

27. Which statement about path and state functions is correct?

28 / 30

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

29 / 30

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

30 / 30

30. What determines whether a boundary allows transfer of matter or energy?

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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 process among the following involves heat exchange with surroundings?

2 / 50

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

3 / 50

3. A closed system is one in which:

4 / 50

4. What is the general relation between enthalpy change (ΔH) and internal energy change (ΔU)?

5 / 50

5. Which pair is correctly matched to standard conditions in this set?

6 / 50

6. Under standard conditions, what is the activity assumed for a 1 M ideal solute?

7 / 50

7. If a chemical equation is multiplied by a factor n, then according to Hess’s law, ΔH becomes:

8 / 50

8. Which of the following changes leads to an increase in entropy?

9 / 50

9. In a reaction where Δn = 0 (no change in moles of gas), what can be said about ΔH and ΔU?

10 / 50

10. For a process with and , what will be the sign of ?

11 / 50

11. When a gas expands reversibly and isothermally, the work done can be expressed as:

12 / 50

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

13 / 50

13. Which of the following molecules is the least stable based on bond enthalpy values?

14 / 50

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

15 / 50

15. For any cyclic process, the net change in which of the following quantities is zero?

16 / 50

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

17 / 50

17. Which of the following is not a correct example of a system?

18 / 50

18. What happens to entropy when ice melts into water at 0°C?

19 / 50

19. Which of the following reactions has ΔH° = 0 by definition?

20 / 50

20. If the ΔH°f for CO₂(g) is –393.5 kJ/mol and for H₂O(l) is –286 kJ/mol, what is ΔH°rxn for combustion of CH₄(g)?

21 / 50

21. Which combination of ΔH and ΔS values always gives a non-spontaneous reaction?

22 / 50

22. The relationship between heat ( q ), heat capacity ( C ), and temperature change is:

23 / 50

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

24 / 50

24. Three moles of a gas with temperature-independent are heated from 300 K to 350 K at constant pressure. What is ?

25 / 50

25. The equation is valid for:

26 / 50

26. A sealed metal container of gas is heated on a flame. Which description fits the boundary and transfers?

27 / 50

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

28 / 50

28. Which relation correctly connects enthalpy and internal energy changes at constant pressure for a gas process?

29 / 50

29. If for air, what is ?

30 / 50

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

31 / 50

31. Which of the following processes is spontaneous at high temperatures but not at low temperatures?

32 / 50

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

33 / 50

33. Which of the following statements is true about spontaneity based on Gibbs free energy?

34 / 50

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

35 / 50

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

36 / 50

36. What are surroundings in thermodynamics?

37 / 50

37. Why is the heat of neutralization nearly constant for all strong acid–strong base reactions?

38 / 50

38. In an irreversible process, the total entropy change (system + surroundings) is always:

39 / 50

39. For an ideal gas with at 300 K, what is and ?

40 / 50

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

41 / 50

41. Which of the following sets contains only intensive properties?

42 / 50

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

43 / 50

43. What does the ratio represent?

44 / 50

44. What is the SI unit of heat capacity?

45 / 50

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

46 / 50

46. Which of the following quantities is not a state function?

47 / 50

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

48 / 50

48. Which condition must be satisfied for a system to be considered isolated?

49 / 50

49. A gas expands in a cylinder doing 400 J of work while losing 150 J of heat. What is ?

50 / 50

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

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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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