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

2 / 30

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

3 / 30

3. A gas expands from 4.0 L to 10.0 L against a constant external pressure of 2.0 atm. What is the work done by the gas?

4 / 30

4. Which of the following is an important use of Hess’s law?

5 / 30

5. 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?

6 / 30

6. Which of the following is true for entropy at absolute zero according to the third law?

7 / 30

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

8 / 30

8. Why is the third law essential in defining the entropy scale?

9 / 30

9. For a closed system, the first law is written as:

10 / 30

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

11 / 30

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

12 / 30

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

13 / 30

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

14 / 30

14. Which of the following is an example where an imaginary boundary is most useful?

15 / 30

15. Which of the following pairs includes only state functions?

16 / 30

16. In an isothermal reversible expansion of an ideal gas, the expression for work is:

17 / 30

17. 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?

18 / 30

18. During adiabatic expansion of an ideal gas:

19 / 30

19. The standard heat of formation of any element in its most stable form is:

20 / 30

20. A perfectly insulated and sealed container of gas is an example of which system?

21 / 30

21. The process of dissolving anhydrous CuSO₄ in water is accompanied by:

22 / 30

22. Which of the following is a spontaneous process?

23 / 30

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

24 / 30

24. What is meant by the heat of neutralization?

25 / 30

25. What is the standard enthalpy of formation (ΔH°f) of an element in its most stable form?

26 / 30

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

27 / 30

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

28 / 30

28. Why is internal energy considered a state function, but work is not?

29 / 30

29. Which of the following is an example of a spontaneous process?

30 / 30

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

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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. What is the standard enthalpy of formation of an element in its most stable form at 298 K and 1 atm?

2 / 50

2. The standard enthalpy of combustion of hydrogen is:

3 / 50

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

4 / 50

4. The unit of pressure–volume work when expressed in SI units is:

5 / 50

5. In a gas cylinder with a movable piston, the piston surface acts as which type of boundary?

6 / 50

6. Which property is necessarily constant for any closed system undergoing any process?

7 / 50

7. For an ideal gas undergoing an isothermal process, which statement is correct?

8 / 50

8. In an indirect reaction path, if the sum of all ΔH values of the steps equals the direct ΔH of the reaction, this confirms:

9 / 50

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

10 / 50

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

11 / 50

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

12 / 50

12. A perfectly insulated and sealed container of gas is an example of which system?

13 / 50

13. 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)?

14 / 50

14. A human body can be considered as which type of system?

15 / 50

15. Which of the following conditions results in maximum work done by a gas?

16 / 50

16. What does the term ( TS ) represent in the Gibbs free energy equation?

17 / 50

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

18 / 50

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

19 / 50

19. The standard enthalpy of combustion of graphite is –393.5 kJ/mol, and that of CO is –283 kJ/mol. Using Hess’s law, calculate ΔH°f for CO.

20 / 50

20. The change in entropy for a reversible process is given by:

21 / 50

21. Why is the N≡N bond in nitrogen gas so stable?

22 / 50

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

23 / 50

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

24 / 50

24. Why is Gibbs free energy an important thermodynamic function?

25 / 50

25. What is the entropy change of the universe for an irreversible process?

26 / 50

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

27 / 50

27. Which of the following is an extensive property?

28 / 50

28. Which of the following statements is correct about system and surroundings?

29 / 50

29. Why is Hess’s law particularly useful in thermochemistry?

30 / 50

30. Which of the following best defines the system in thermodynamics?

31 / 50

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

32 / 50

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

33 / 50

33. Which of the following is a spontaneous process?

34 / 50

34. A system defined by an imaginary boundary is often used when:

35 / 50

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

36 / 50

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

37 / 50

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

38 / 50

38. Which example best represents an open system?

39 / 50

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

40 / 50

40. What is meant by the heat of dilution?

41 / 50

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

42 / 50

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

43 / 50

43. What is meant by a thermodynamic system?

44 / 50

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

45 / 50

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

46 / 50

46. Which of the following pairs includes only state functions?

47 / 50

47. What is a reversible process in thermodynamics?

48 / 50

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

49 / 50

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

50 / 50

50. At 298 K a reaction has . What is the equilibrium constant ( 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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