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

2 / 30

2. If 2 L of gas reacts completely with 1 L of gas at the same T and P, the volume of vapor formed will be:

3 / 30

3. Which concept explains why liquefaction of gases is possible at low temperature and high pressure?

4 / 30

4. The heat absorbed during the conversion of 1 mole of ice at to water at is called:

5 / 30

5. Which conclusion can be drawn from the three types of molecular speeds?

6 / 30

6. The value of for CO₂ at moderate pressures is often less than 1. This indicates:

7 / 30

7. Why is temperature in Kelvin used in Charles’ law instead of Celsius?

8 / 30

8. Why does Dalton’s law hold true for ideal gases?

9 / 30

9. In the nematic phase of liquid crystals, molecules are:

10 / 30

10. Two flasks of equal volume contain equal masses of hydrogen and oxygen at the same T and P. Which statement is correct?

11 / 30

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

12 / 30

12. Which statement is true regarding London dispersion forces?

13 / 30

13. Order the intermolecular forces from weakest to strongest:

14 / 30

14. Which gas law explains why lungs may overexpand and rupture if a scuba diver ascends too quickly?

15 / 30

15. How many liters of at and form when decomposes completely?

16 / 30

16. Which has stronger intermolecular forces: or ?

17 / 30

17. What volume will mol occupy at and ?

18 / 30

18. Surface tension is measured in SI units as:

19 / 30

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

20 / 30

20. Charles’ law states that for a fixed mass of gas at constant pressure:

21 / 30

21. Which industrial application directly depends on control of viscosity?

22 / 30

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

23 / 30

23. Hydrogen diffuses four times faster than which of the following gases?

24 / 30

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

25 / 30

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

26 / 30

26. Which step is essential in deriving the kinetic theory equation for pressure?

27 / 30

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

28 / 30

28. As temperature of a gas increases at constant volume, what happens to the molecular motion?

29 / 30

29. Which of the following best explains why compressibility factor is useful?

30 / 30

30. The critical pressure () is defined as:

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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!

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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 graph represents Gay Lussac’s law correctly?

2 / 50

2. Which of the following factors directly determines the thermal energy of a substance?

3 / 50

3. When pressure on a solid increases, its melting point usually:

4 / 50

4. The graph of Boyle’s law (P vs V) at constant temperature is:

5 / 50

5. Which of the following gases will have the same average kinetic energy at 300 K?

6 / 50

6. Boyle’s law fails at:

7 / 50

7. Which step is essential in deriving the kinetic theory equation for pressure?

8 / 50

8. As temperature of a gas increases at constant volume, what happens to the molecular motion?

9 / 50

9. Which force is dominant in the interaction between ion and molecule?

10 / 50

10. Surface tension becomes zero at:

11 / 50

11. The critical pressure () is defined as:

12 / 50

12. In a vs curve for a real gas, when the curve dips below the ideal line, it indicates:

13 / 50

13. A supercritical fluid is defined as:

14 / 50

14. Which of the following correctly represents SI units of pressure?

15 / 50

15. The critical temperature () of a gas is defined as:

16 / 50

16. Which pair of gases will diffuse at approximately the same rate?

17 / 50

17. Which of the following optical property is unique to liquid crystals?

18 / 50

18. Ammonia gas () diffuses through a porous pot in 40 s. How long would hydrogen () take under the same conditions?

19 / 50

19. In the isotherms of CO₂ obtained by Andrews, the horizontal flat portion represents:

20 / 50

20. The rate of diffusion of helium is how many times greater than that of methane (, M = 16)?

21 / 50

21. Which of the following terms refers to the direct conversion of a solid into vapor without passing through the liquid state?

22 / 50

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

23 / 50

23. A 1:1 mixture of H₂ (M = 2) and CH₄ (M = 16) diffuses through a porous plug. What is the relative rate of diffusion of the mixture compared to O₂ (M = 32)?

24 / 50

24. Why do small insects like water striders walk on water without sinking?

25 / 50

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

26 / 50

26. A gas has volume 6.0 L at 3 atm pressure. What will be its pressure if the volume changes to 2.0 L at constant temperature?

27 / 50

27. In the van der Waals equation, the constant accounts for:

28 / 50

28. At the critical point of a gas:

29 / 50

29. What would happen to the volume of a gas at constant pressure if its absolute temperature approaches zero?

30 / 50

30. Which condition favors gaseous state most strongly?

31 / 50

31. For a non-polar gas like helium, deviation from ideality is mainly due to:

32 / 50

32. Which of the following equations is used to measure viscosity of liquids using capillary flow?

33 / 50

33. The intercept of the extrapolated Volume vs Temperature (°C) graph of a gas is:

34 / 50

34. In an experiment, 100 mL of hydrogen diffuses in 25 seconds. How long will it take for the same volume of oxygen () to diffuse under identical conditions?

35 / 50

35. Which of the following best explains Brownian motion?

36 / 50

36. A gas has mol in a rigid vessel at . What is in kPa?

37 / 50

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

38 / 50

38. The work required to increase the surface area of a liquid by 1 unit is equal to:

39 / 50

39. Which process explains the formation of dew drops on grass in the early morning?

40 / 50

40. Which gas can be liquefied more easily due to stronger London dispersion forces?

41 / 50

41. Why does kinetic theory assume intermolecular forces are negligible in gases?

42 / 50

42. Which condition favors ideal behavior most strongly?

43 / 50

43. Why does carbon dioxide show greater deviation than nitrogen at the same conditions?

44 / 50

44. A gas occupies 4 L at 2 atm. What will be its volume at 1 atm and constant temperature?

45 / 50

45. What is the compressibility factor for an ideal gas?

46 / 50

46. Surface tension of a liquid is defined as:

47 / 50

47. Surface tension is measured in SI units as:

48 / 50

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

49 / 50

49. At high pressure, the compressibility factor of most real gases is:

50 / 50

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

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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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