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

2 / 30

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

3 / 30

3. Why do real gases deviate from ideal behavior at high pressure?

4 / 30

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

5 / 30

5. Thermal energy of a system is defined as:

6 / 30

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

7 / 30

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

8 / 30

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

9 / 30

9. The critical volume () is:

10 / 30

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

11 / 30

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

12 / 30

12. Which real-life application illustrates Charles’ law?

13 / 30

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

14 / 30

14. The critical pressure () of a gas is:

15 / 30

15. If for a real gas at high pressure, the reason is:

16 / 30

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

17 / 30

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

18 / 30

18. At constant T and P, 1 L of H₂ contains 0.04 mol. How many liters of O₂ at same T and P will contain 0.08 mol?

19 / 30

19. Vapour pressure of a liquid increases with:

20 / 30

20. The functioning of LCD screens is based on:

21 / 30

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

22 / 30

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

23 / 30

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

24 / 30

24. How many moles of are in at and ?

25 / 30

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

26 / 30

26. Which of the following applications is based on surface tension?

27 / 30

27. A supercritical fluid is defined as:

28 / 30

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

29 / 30

29. Supercritical CO₂ is used in green chemistry because:

30 / 30

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

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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 equation represents the ideal gas law?

2 / 50

2. Which curve obtained by Andrews is called the "isotherm of critical temperature"?

3 / 50

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

4 / 50

4. A sample of H₂ effuses through a hole in 10 minutes. Under same conditions, how long will it take the same volume of methane (CH₄, M=16) to effuse?

5 / 50

5. Which practical device works on the principle of Boyle’s law?

6 / 50

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

7 / 50

7. How many moles of are in at and ?

8 / 50

8. Which of the following statements is correct for Boyle’s law?

9 / 50

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

10 / 50

10. Boyle’s law can be stated as:

11 / 50

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

12 / 50

12. A fixed mass of gas expands from to at the same temperature. The ratio of final to initial density is:

13 / 50

13. Which assumption of kinetic theory explains why gases have neither definite shape nor definite volume?

14 / 50

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

15 / 50

15. In scuba diving, the composition of compressed air cylinders must consider Dalton’s law because:

16 / 50

16. A 1 L flask contains 0.5 mol of H₂ at 300 K. Another 1 L flask contains 0.5 mol of O₂ at 600 K. If both gases are mixed in a 2 L vessel at 300 K, find total pressure.

17 / 50

17. If a gas exerts 760 mmHg pressure at 273 K, what pressure will it exert at 546 K at constant volume?

18 / 50

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

19 / 50

19. How does increased molecular motion affect vapor pressure of a liquid?

20 / 50

20. Which of the following experimental setups best verifies Boyle’s law?

21 / 50

21. Why is the boiling point of HF higher than HCl, though HCl has greater molar mass?

22 / 50

22. Which gas behaves most ideally under ordinary conditions?

23 / 50

23. Which gas diffuses about 1.6 times faster than chlorine (, M=71)?

24 / 50

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

25 / 50

25. Which value of should be used when is in atm and in liters?

26 / 50

26. The functioning of LCD screens is based on:

27 / 50

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

28 / 50

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

29 / 50

29. At what temperature will the pressure of a gas become zero, if it obeyed Gay Lussac’s law perfectly?

30 / 50

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

31 / 50

31. In Andrews’ experiment, what happened to CO₂ when pressure was increased at a temperature below its critical temperature?

32 / 50

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

33 / 50

33. Which property of supercritical fluids is closer to gases?

34 / 50

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

35 / 50

35. Why does ammonia gas deviate strongly from ideal behavior?

36 / 50

36. In the above question, what is the partial pressure of oxygen?

37 / 50

37. Which chemical equation shows the role of surface tension in dissolving detergent micelles?

38 / 50

38. Which of the following explains why gases are more compressible than liquids?

39 / 50

39. Which equation relates pressure, volume, temperature, and moles for an ideal gas?

40 / 50

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

41 / 50

41. Which has stronger intermolecular forces: or ?

42 / 50

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

43 / 50

43. Why does high pressure promote liquefaction of gases?

44 / 50

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

45 / 50

45. Which of the following best explains why gases are compressible but solids are not?

46 / 50

46. Which type of force is mainly responsible for the high solubility of and in water?

47 / 50

47. At 100 °C, water boils because:

48 / 50

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

49 / 50

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

50 / 50

50. At absolute zero (), the thermal energy of an ideal gas is:

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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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