Exam-Style Online Test | Class 11: States Of Matter Test

Class 11 Chemistry — Chapter 5: States of Matter Online Test

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Class 11 Chemistry: States of Matter 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. A rigid vessel at contains mol and mol . An electric spark causes complete reaction . After cooling back to , what is the final pressure?

2 / 20

2. Which property makes supercritical fluids useful as solvents in industry?

3 / 20

3. Which curve best represents the relation between vapour pressure and temperature?

4 / 20

4. What is the critical temperature of CO₂ observed in Andrews’ experiments?

5 / 20

5. The van der Waals constant has which units (for 1 mol gas)?

6 / 20

6. Why is added to pressure in the van der Waals equation?

7 / 20

7. At very low pressure, the compressibility factor of a real gas approaches:

8 / 20

8. If for a gas, it means:

9 / 20

9. If hydrogen () has an RMS speed of 1840 m/s at a given temperature, what is the RMS speed of oxygen () at the same temperature?

10 / 20

10. Which relation connects pressure, volume, and average kinetic energy of molecules?

11 / 20

11. Which constant directly connects molecular kinetic energy with absolute temperature?

12 / 20

12. Which assumption of kinetic theory explains the compressibility of gases?

13 / 20

13. Which of the following statements is correct about Dalton’s law?

14 / 20

14. If 3 L of nitrogen gas contains molecules at constant T and P, how many molecules will 6 L of nitrogen contain?

15 / 20

15. Which statement is true about Avogadro’s number ()?

16 / 20

16. The graph of Gay Lussac’s law (Pressure vs Temperature) is:

17 / 20

17. Which everyday example best demonstrates Charles’ law?

18 / 20

18. Boyle’s law is valid under which condition?

19 / 20

19. Which has stronger intermolecular forces: or ?

20 / 20

20. The correct order of diffusion rate at room temperature is:

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Class 11 Chemistry: States of Matter 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.

Get new questions on each attempt

  • Total Questions: 30
  • Time Allotted: 45 minutes
  • Passing Score: 50%
  • Randomization: Yes
  • Certificate: No
  • Retake: Allowed
  • Price: 100% Free

Good luck! 👍

1 / 30

1. If gas A has molar mass 4 and gas B has molar mass 64, the ratio of their diffusion rates () is:

2 / 30

2. As pressure on a gas increases at constant temperature, what happens to molecular motion?

3 / 30

3. Which of the following statements about liquid crystal displays (LCDs) is correct?

4 / 30

4. Which of the following processes is exothermic?

5 / 30

5. For a real gas, indicates:

6 / 30

6. Boyle’s law is valid under which condition?

7 / 30

7. Which additional application of supercritical fluids is correct?

8 / 30

8. Which of the following gases shows larger deviation due to molecular volume rather than intermolecular attraction?

9 / 30

9. For 1 mole of a gas, the van der Waals equation is:

10 / 30

10. For a real gas, indicates:

11 / 30

11. The average translational kinetic energy per mole of a gas is given by:

12 / 30

12. Which condition makes the van der Waals equation reduce to the ideal gas law?

13 / 30

13. If vapour pressure of liquid A is greater than liquid B at the same temperature, then:

14 / 30

14. The supercritical fluid region in Andrews’ isotherms lies:

15 / 30

15. Which of the following liquids forms a convex meniscus in a glass capillary?

16 / 30

16. Which law is applied when calculating the pressure exerted by different gases in a scuba tank mixture (oxygen + nitrogen)?

17 / 30

17. Which intermolecular force explains the higher boiling point of HF compared to HCl?

18 / 30

18. Which of the following gases cannot be liquefied at room temperature (298 K) by applying pressure?

19 / 30

19. Why do liquids evaporate even at temperatures below their boiling point?

20 / 30

20. For a real gas, indicates:

21 / 30

21. Which gas law is most directly applied to explain the working of hot air balloons?

22 / 30

22. A gas sample initially at 1 atm and 500 mL is compressed isothermally to 250 mL. The final pressure is:

23 / 30

23. Which device demonstrates Gay Lussac’s law in everyday life?

24 / 30

24. A mixture of 2 mol , 2 mol , and 4 mol exerts 1 atm total pressure. The partial pressure of nitrogen is:

25 / 30

25. A 2 L container has 0.50 mol of and 0.50 mol of at 300 K. The total pressure is 24.6 atm. What is the partial pressure of each gas?

26 / 30

26. The relation between critical constants and van der Waals constants is:

27 / 30

27. Which property enables gases to be stored in large amounts in small steel cylinders?

28 / 30

28. Which phenomenon demonstrates surface tension in everyday life?

29 / 30

29. Which factor explains why solid (dry ice) sublimes at room temperature?

30 / 30

30. Dalton’s law can be combined with the ideal gas equation to give:

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Class 11 Chemistry: States of Matter 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!

Earn a certificate upon passing

Get new questions with every attempt

  • Total Questions: 50
  • Time Allotted: 75 minutes
  • Passing Score: 70%
  • Randomization: Yes
  • Certificate: Yes
  • Retake: Allowed
  • Price: 100% Free

Good luck! 👍

1 / 50

1. A 10 L container has 2 mol of N₂ and 3 mol of H₂ at 300 K. A spark is introduced and gases react to form NH₃. If reaction goes to completion, what is the total pressure after cooling to 300 K? ()

2 / 50

2. Which type of intermolecular force is most significant in liquid ?

3 / 50

3. Which experiment confirmed Avogadro’s hypothesis?

4 / 50

4. In an experiment, two gases diffuse through the same pinhole. If gas A takes 36 s and gas B takes 64 s, the ratio of their molar masses () is:

5 / 50

5. If the temperature of a gas is doubled, its average kinetic energy becomes:

6 / 50

6. The coefficient of viscosity is related to viscous drag force by the equation:

7 / 50

7. In the compressibility curve of hydrogen and helium, the value is always:

8 / 50

8. Why do liquids evaporate even at temperatures below their boiling point?

9 / 50

9. Under which conditions does best describe real gases?

10 / 50

10. Why do metals typically have high melting and boiling points?

11 / 50

11. If gas A has molar mass 4 and gas B has molar mass 64, the ratio of their diffusion rates () is:

12 / 50

12. Liquids with stronger intermolecular forces will have:

13 / 50

13. For a gas at constant temperature, when volume decreases by half, pressure:

14 / 50

14. Which statement about densities is correct?

15 / 50

15. A rigid vessel at contains mol and mol . An electric spark causes complete reaction . After cooling back to , what is the final pressure?

16 / 50

16. Which of the following increases with addition of surfactants in water?

17 / 50

17. Which of the following correctly arranges intermolecular forces in increasing order of strength?

18 / 50

18. In the above mixture (Q471), what is the partial pressure of N₂?

19 / 50

19. A sample of NH₃ effuses in 30 seconds. How long will an equal volume of SO₂ take to effuse under same conditions? (M of NH₃ = 17, SO₂ = 64).

20 / 50

20. A gas sample has volume 2.0 L at 300 K. What will be its volume at 450 K if pressure remains constant?

21 / 50

21. Which of the following gases will have the smallest value of ?

22 / 50

22. Which condition minimizes deviation from ideality caused by both intermolecular forces and molecular volume?

23 / 50

23. One mole of oxygen gas at STP occupies 22.4 L. What volume will 0.5 mol of oxygen occupy under the same conditions?

24 / 50

24. At the critical point of a gas:

25 / 50

25. Which expression connects compressibility factor with molar volume?

26 / 50

26. The mathematical form of Avogadro’s law is:

27 / 50

27. A mixture of 2 mol , 3 mol , and 5 mol exerts 9 atm total pressure. The partial pressure of is:

28 / 50

28. Which condition favors gaseous state most strongly?

29 / 50

29. Which condition favors ideal behavior most strongly?

30 / 50

30. Liquid crystals are best described as:

31 / 50

31. Which of the following equations is derived from Charles’ law?

32 / 50

32. The coefficient of volume expansion is generally in the order:

33 / 50

33. The physical state of a substance at a given temperature depends mainly on the balance between:

34 / 50

34. Which of the following is the correct dimension of the term in the pressure equation?

35 / 50

35. Why does adding alcohol to water decrease its surface tension?

36 / 50

36. Which of the following gases shows the largest deviation in compressibility factor due to hydrogen bonding?

37 / 50

37. Which of the following is NOT consistent with Avogadro’s law?

38 / 50

38. A gas mixture contains 2 mol , 1 mol , and 1 mol . If the total pressure is 8 atm, what is the partial pressure of hydrogen?

39 / 50

39. Which property of gases can be predicted using critical constants?

40 / 50

40. Which is true regarding thermal energy in liquids compared to solids?

41 / 50

41. Which state of matter has definite volume but no definite shape?

42 / 50

42. The temperature at which a gas theoretically occupies zero volume is called:

43 / 50

43. For a real gas, indicates:

44 / 50

44. Which liquid has the highest surface tension at room temperature?

45 / 50

45. The expression for the most probable speed () is:

46 / 50

46. A supercritical fluid is defined as:

47 / 50

47. A balloon has a volume of 2.5 L at 20°C. At what temperature will it occupy 5.0 L, assuming pressure is constant?

48 / 50

48. The root mean square (RMS) speed is defined as:

49 / 50

49. Which factor does not affect the vapour pressure of a liquid?

50 / 50

50. For nitrogen gas at 300 K, the three molecular speeds are approximately:

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Practice States of Matter MCQs
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Class 11 Chemistry — Chapter 5: States of Matter Online Test

Welcome to the Class 11 Chemistry: Chapter 5 – States of Matter Online Test page. This test offers a collection of 494 MCQs that cover the essential concepts of the states of matter, including gases, liquids, and solids. The online test is designed to help you strengthen your understanding and master the key topics in this chapter. It is free, aligned with the CBSE/NCERT curriculum, and available for unlimited attempts. Each paper is timed, and you will get instant feedback after each attempt.

Struggling with the gas laws, or trying to understand intermolecular forces? This test is an excellent way to practice and prepare yourself for upcoming exams. Think of this as your personal online mock test for the States of Matter chapter, available anytime on your phone or computer. Whether you’re a beginner or an advanced learner, you can progress through the Easy, Medium, and Hard levels, and track your improvements as you go.

What is this Class 11 Chemistry: States of Matter Online Test?

This page features three different difficulty levels of the MCQ test for Chapter 5:

  • 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 ~494 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, so you’ll get a new set of questions on each attempt. The test is timed, and once you submit your answers, you’ll instantly see your score and a review of your responses.

Topics covered in these online tests

This test focuses on essential topics in Chapter 5, which covers the three states of matter and their properties. The main concepts that you will practice include:

  • Properties of Gases — Ideal gas law, gas laws, Boyle’s law, Charles’ law, and real gases
  • Ideal Gas Equation — PV = nRT, applications of the ideal gas equation
  • Liquids — Properties of liquids, viscosity, surface tension, and capillarity
  • Solids — Properties of solids, crystal lattices, and unit cells
  • Intermolecular Forces — Types of forces, dipole-dipole interactions, hydrogen bonding, London dispersion forces
  • Gas Laws & Kinetic Molecular Theory — Kinetic theory of gases, deviations from ideal gas behavior, Maxwell’s distribution of velocities
  • Liquefaction of Gases — Critical temperature, critical pressure, Van der Waals equation of state
  • Real Gases — Compressibility factor, deviations from ideal gas behavior
  • Surface Chemistry — Adsorption, adsorption isotherms, catalysis

How This Exam-Style Online Test Works

Simple Steps: Select a paper → Answer the questions within the time limit → Submit → View your results instantly with a detailed breakdown.

What you’ll experience in this test

  • MCQs: One question with four possible answers (A, B, C, D).
  • Timer on top: Paper 1: 30 minutes • Paper 2: 45 minutes • Paper 3: 75 minutes.
  • Pagination: Typically 10 questions per page. Use navigation to move between questions.
  • Answer Review: After finishing the test, you’ll receive your score, along with the correct answers and detailed explanations.
  • Instant Feedback: Click View Result to see your score, and review the questions you answered incorrectly.
  • Retake Option: Click Restart Test to try again with a new set of questions (Paper 2 & 3).

Note: Share your feedback on the result page after completing the test to help us improve.

Marking & Pass Criteria

  • Scoring: +1 for every correct answer, 0 for incorrect (no negative marking).
  • Passing Marks: Paper 1 — 40% • Paper 2 — 50% • Paper 3 — 70%.
  • Randomization: Paper 2 & Paper 3 will shuffle questions from a pool of ~494 questions. Paper 1 remains fixed.

Who can take this test?

  • Class 11 CBSE students preparing for unit tests, half-yearlies, and final exams.
  • Class 12 bridge students revising basic concepts of States of Matter.
  • JEE/NEET aspirants focusing on understanding gas laws, properties of gases, and real gases for competitive exams.
  • School teachers / tutors needing a ready-to-use, chapter-specific test for homework, practice, or revision.
  • Self-learners and homeschoolers who wish to test their knowledge and improve concepts.

Benefits of this online test

  • Exam-like experience: Get a feel for timed, exam-style questions with real-time feedback.
  • Instant results: Learn from your mistakes immediately after each attempt.
  • Stepped-up difficulty: Start with the basics, progress to intermediate questions, and challenge yourself with harder ones.
  • Unlimited attempts: Practice as often as you like to improve speed and accuracy.
  • Zero cost: No fees or hidden charges — completely free for all students.

How this test can help you study better

  • Step 1 – Initial understanding: Try Paper 1 to check your knowledge on fundamental concepts.
  • Step 2 – Consolidate learning: Move to Paper 2 (randomized) to cover intermediate-level questions.
  • Step 3 – Challenge yourself: Attempt Paper 3 to strengthen exam-readiness with tougher questions.
  • Step 4 – Review mistakes: Revisit wrong answers, learn from them, and improve your accuracy.

Important Notes (read before starting)

  • Do not refresh or close the test tab to avoid losing progress.
  • Best experience: Use a modern browser (Chrome/Edge), stable internet connection, and a distraction-free environment.
  • Allow cookies / local storage for smooth tracking of progress and results.
  • Safety: This test is 100% FREE, and there are no hidden charges.

Additional Practice for Class 11 Chemistry

To continue your preparation, explore the full collection of Class 11 Chemistry MCQs: Class 11 Chemistry Online Test Index or practice all chapters from the Class 11 Chemistry MCQ Collection.

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