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 relation is correct for diffusion rates of gases A and B?

2 / 30

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

3 / 30

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

4 / 30

4. 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).

5 / 30

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

6 / 30

6. Which property of supercritical fluids is closer to liquids?

7 / 30

7. A gas sample at constant volume has a pressure of 400 mmHg at 200 K. What will be the pressure at 400 K?

8 / 30

8. In the pressure derivation, why is the factor included in the equation?

9 / 30

9. The average speed of gas molecules is given by:

10 / 30

10. Which of the following decreases vapour pressure of a liquid?

11 / 30

11. Which statement best describes the internal arrangement (“order”) of particles?

12 / 30

12. Which of the following liquids will show the highest decrease in viscosity with rise in temperature?

13 / 30

13. Which factor does not significantly influence the viscosity of a liquid?

14 / 30

14. A gas mixture contains 2 mol of O₂, 3 mol of N₂, and 1 mol of CO₂ in a 20 L container at 300 K. Calculate the total pressure and the partial pressure of CO₂. ( L·atm·K⁻¹·mol⁻¹)

15 / 30

15. A sealed container of gas has pressure 5 atm at 400 K. What will be the pressure at 200 K?

16 / 30

16. Which has stronger intermolecular forces: or ?

17 / 30

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

18 / 30

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

19 / 30

19. A binary mixture of and effuses times faster than pure at the same and . What is the mole fraction of in the mixture?

20 / 30

20. Why do small liquid drops form spherical shapes?

21 / 30

21. The relation between vapour pressure and enthalpy of vaporization is expressed by:

22 / 30

22. Which of the following mathematical forms correctly represents Boyle’s law?

23 / 30

23. Which factor is more significant at low pressure?

24 / 30

24. The diffusion rate of (M=28) compared to (M=44) is:

25 / 30

25. Which feature distinguishes the smectic phase from the nematic phase?

26 / 30

26. Why must temperature always be measured in Kelvin when applying Gay Lussac’s law?

27 / 30

27. Which of the following graphs represents Charles’ law?

28 / 30

28. Which phenomenon in plants is partially explained by surface tension?

29 / 30

29. According to kinetic theory, the average kinetic energy of a molecule of an ideal gas is:

30 / 30

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

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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. The mathematical form of Avogadro’s law is:

2 / 50

2. 2 g of H₂ and 16 g of O₂ are placed in a 5 L vessel at 300 K. What is the total pressure? ().

3 / 50

3. Which of the following is measured by a thermometer?

4 / 50

4. Which of the following mathematical forms correctly represents Boyle’s law?

5 / 50

5. Which real-life application uses Graham’s law of diffusion?

6 / 50

6. Unit of viscosity in the CGS system is:

7 / 50

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

8 / 50

8. Which of the following substances lowers surface tension when added to water?

9 / 50

9. What makes liquid crystals fundamentally important in modern materials science?

10 / 50

10. What is the effect of adding impurities like electrolytes on viscosity of water?

11 / 50

11. What is the density of at and ? ()

12 / 50

12. Why does viscosity of gases increase with temperature, unlike liquids?

13 / 50

13. At 100 °C, water boils because:

14 / 50

14. When repulsive forces dominate over attractive forces in a gas, what happens to compressibility factor ?

15 / 50

15. Which of the following states of matter has the highest degree of random molecular motion?

16 / 50

16. Which real-life example demonstrates Avogadro’s law?

17 / 50

17. If 1 L of hydrogen escapes from a small hole in 10 minutes, how much oxygen will escape in the same time under identical conditions?

18 / 50

18. If gas A diffuses twice as fast as gas B, the ratio of their molar masses is:

19 / 50

19. Which of the following correctly relates root mean square speed to pressure equation?

20 / 50

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

21 / 50

21. Relative viscosity of two liquids (1 and 2) using Ostwald viscometer is given by:

22 / 50

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

23 / 50

23. A gas occupies 5 L at 750 mmHg and 300 K. What pressure will it exert at 450 K, keeping volume constant?

24 / 50

24. Why does vapour pressure increase rapidly with temperature?

25 / 50

25. Which is the main cause of deviation of real gases from ideal behavior at low temperature?

26 / 50

26. Which of the following is an application of Avogadro’s law?

27 / 50

27. Two gases are mixed into a final vessel at . Gas A: at . Gas B: at . Assuming ideal behavior, what is the final total pressure at ?

28 / 50

28. According to kinetic theory, the average kinetic energy of gas molecules is directly proportional to:

29 / 50

29. Which equation relates vapour pressure and enthalpy of vaporization?

30 / 50

30. How does viscosity of a liquid change with temperature?

31 / 50

31. Which of the following best describes thermal energy compared to heat?

32 / 50

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

33 / 50

33. A 2 L flask contains O₂ at 3 atm and a 3 L flask contains H₂ at 4 atm, both at same temperature. If gases are mixed in a 5 L vessel, what is the total pressure?

34 / 50

34. The critical constants () are related to which equation of state?

35 / 50

35. Which of the following liquids will show the highest decrease in viscosity with rise in temperature?

36 / 50

36. Which graph represents Gay Lussac’s law correctly?

37 / 50

37. Boyle’s law can be stated as:

38 / 50

38. Which real-life application depends on vapour pressure differences?

39 / 50

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

40 / 50

40. Which of the following is not an assumption of the kinetic theory of gases?

41 / 50

41. Which assumption of kinetic theory is mainly violated when real gases deviate from ideal behavior?

42 / 50

42. How many moles of are in at and ?

43 / 50

43. The mathematical form of Gay Lussac’s law is:

44 / 50

44. Which of the following best explains why detergents help in cleaning greasy clothes?

45 / 50

45. If a balloon expands from 2.0 L at 300 K to 3.0 L, what is the final temperature at constant pressure?

46 / 50

46. According to Avogadro’s law, equal volumes of gases at the same temperature and pressure contain:

47 / 50

47. Andrews’ experiments on CO₂ demonstrated the concept of:

48 / 50

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

49 / 50

49. Which of the following correctly describes motion of gas molecules according to kinetic theory?

50 / 50

50. Which state has the largest bulk modulus (thus the least compressible)?

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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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