Exam-Style Online Test | Class 11 Chemistry: Thermodynamics

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

2 / 30

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

3 / 30

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

4 / 30

4. What is meant by a state function in thermodynamics?

5 / 30

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

6 / 30

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

7 / 30

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

8 / 30

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

9 / 30

9. One mole of an ideal gas expands isothermally and reversibly at 298 K from 2.0 L to 8.0 L. What is of the gas?

10 / 30

10. Which of the following processes occurs in an isolated system?

11 / 30

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

12 / 30

12. Which of the following characteristics does not apply to an open system?

13 / 30

13. Which of the following reactions can be used to illustrate Hess’s law?

14 / 30

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

15 / 30

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

16 / 30

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

17 / 30

17. Which statement best summarizes Hess’s law?

18 / 30

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

19 / 30

19. Which of the following statements about entropy in reversible and irreversible processes is correct?

20 / 30

20. If , which factor decreases Gibbs free energy the most at high temperatures?

21 / 30

21. The absolute entropy of gases is higher than that of solids because:

22 / 30

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

23 / 30

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

24 / 30

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

25 / 30

25. The melting of ice at 0°C and 1 atm is an example of:

26 / 30

26. A diatomic ideal gas undergoes a reversible adiabatic expansion from at to . Take . What is the final pressure?

27 / 30

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

28 / 30

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

29 / 30

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

30 / 30

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

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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 describes the boundary between system and surroundings?

2 / 50

2. What happens to the heat of dilution as a solution becomes very dilute?

3 / 50

3. Which of the following correctly describes spontaneity?

4 / 50

4. What is meant by a spontaneous process?

5 / 50

5. At constant volume, the molar heat capacity of an ideal gas is represented as:

6 / 50

6. What does the term pressure–volume (P–V) work represent in thermodynamics?

7 / 50

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

8 / 50

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

9 / 50

9. Which statement best summarizes Hess’s law?

10 / 50

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

11 / 50

11. Which of the following is the correct expression of Hess’s law?

12 / 50

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

13 / 50

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

14 / 50

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

15 / 50

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

16 / 50

16. Which of the following correctly represents the relationship between enthalpy and internal energy?

17 / 50

17. What are extensive properties in thermodynamics?

18 / 50

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

19 / 50

19. Which of the following is a path function?

20 / 50

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

21 / 50

21. The differential form of enthalpy is most generally written as:

22 / 50

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

23 / 50

23. Hess’s law can also be applied in determining which other thermodynamic function besides ΔH?

24 / 50

24. Which one of the following is not an extensive property?

25 / 50

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

26 / 50

26. Which of the following correctly expresses the difference between molar heat capacities and ?

27 / 50

27. The standard enthalpy of combustion of hydrogen is:

28 / 50

28. What does Hess’s law state?

29 / 50

29. Which thermodynamic function becomes zero at absolute zero for a perfect crystal?

30 / 50

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

31 / 50

31. What is entropy a measure of?

32 / 50

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

33 / 50

33. Which of the following is an extensive property?

34 / 50

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

35 / 50

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

36 / 50

36. Which of the following is an irreversible process?

37 / 50

37. In an open system like a steam turbine, what type of interaction occurs with surroundings?

38 / 50

38. Which statement correctly distinguishes standard conditions from STP in many textbooks?

39 / 50

39. Why are standard conditions specified when tabulating thermodynamic data?

40 / 50

40. Which thermodynamic law is directly demonstrated by an isolated system?

41 / 50

41. Two moles of an ideal gas are heated at constant pressure from 300 K to 500 K. If , what is the entropy change of the gas?

42 / 50

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

43 / 50

43. The enthalpy of formation of CO(g) can be calculated using Hess’s law from:

44 / 50

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

45 / 50

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

46 / 50

46. What is meant by a state function in thermodynamics?

47 / 50

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

48 / 50

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

49 / 50

49. The equation is valid for:

50 / 50

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

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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).
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  • 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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