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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. Which intermolecular force determines the liquefaction ease of ?

2 / 30

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

3 / 30

3. Which everyday example best demonstrates Charles’ law?

4 / 30

4. 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? ()

5 / 30

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

6 / 30

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

7 / 30

7. Which application of surface tension is used in medicine?

8 / 30

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

9 / 30

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

10 / 30

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

11 / 30

11. Which assumption of kinetic theory best explains why gases have very low densities compared to liquids and solids?

12 / 30

12. Which statement about densities is correct?

13 / 30

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

14 / 30

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

15 / 30

15. A gas has pressure of 2 atm at 300 K. What will be its pressure at 450 K if volume is constant?

16 / 30

16. Which of the following molecules exhibits dipole–dipole interactions?

17 / 30

17. Which gas law explains why helium is preferred to nitrogen in deep-sea diving gas mixtures?

18 / 30

18. 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).

19 / 30

19. Which expression connects compressibility factor with molar volume?

20 / 30

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

21 / 30

21. A mixture of gases at 27°C and 1 atm contains 0.4 mol of and 0.6 mol of . What is the partial pressure of nitrogen?

22 / 30

22. Which of the following liquids has the highest viscosity at room temperature?

23 / 30

23. Unit of viscosity in the CGS system is:

24 / 30

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

25 / 30

25. Which intermolecular force is primarily responsible for the liquefaction of nonpolar gases like and ?

26 / 30

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

27 / 30

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

28 / 30

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

29 / 30

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

30 / 30

30. Which of the following correctly relates root mean square speed to 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!

Earn a certificate upon passing

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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. According to Poiseuille’s equation, viscosity of a liquid is directly proportional to:

2 / 50

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

3 / 50

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

4 / 50

4. Which example demonstrates thermal energy being reduced until intermolecular forces dominate?

5 / 50

5. 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)?

6 / 50

6. Which law relates viscous force to velocity gradient in liquids?

7 / 50

7. Which gas has the highest critical temperature among the following?

8 / 50

8. A supercritical fluid is defined as:

9 / 50

9. Vapour pressure curves of volatile liquids intersect the atmospheric pressure line at:

10 / 50

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

11 / 50

11. Which type of intermolecular force exists in all substances, regardless of polarity?

12 / 50

12. Which factor causes ionic solids like NaCl to have very high melting points?

13 / 50

13. A gas is kept at 300 K. Its pressure increases from 1 atm to 5 atm. If initial volume is 10 L, what is the final volume?

14 / 50

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

15 / 50

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

16 / 50

16. For an ideal gas, how does the vs plot appear at constant temperature?

17 / 50

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

18 / 50

18. Supercritical CO₂ is used in green chemistry because:

19 / 50

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

20 / 50

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

21 / 50

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

22 / 50

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

23 / 50

23. In compressibility factor vs curves, for an ideal gas:

24 / 50

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

25 / 50

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

26 / 50

26. 200 mL of H₂ at 27 °C and 1 atm is mixed with 200 mL of O₂ at 27 °C and 2 atm. The final pressure in 400 mL vessel at 27 °C will be:

27 / 50

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

28 / 50

28. Which statement best summarizes the relationship between kinetic energy and temperature?

29 / 50

29. 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?

30 / 50

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

31 / 50

31. For a real gas, indicates:

32 / 50

32. Which situation illustrates intermolecular forces dominating over thermal energy?

33 / 50

33. 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?

34 / 50

34. Why does ethanol have a lower boiling point than water, even though both exhibit hydrogen bonding?

35 / 50

35. Which interaction is responsible for the solubility of ionic compounds in polar solvents?

36 / 50

36. The average translational kinetic energy of one molecule of an ideal gas is given by:

37 / 50

37. Why does vapour pressure increase rapidly with temperature?

38 / 50

38. Which of the following correctly matches the gas speeds?

39 / 50

39. At temperatures above the critical temperature, Andrews found that:

40 / 50

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

41 / 50

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

42 / 50

42. Which law explains why an inflated football shrinks when taken from a warm room into a cold environment?

43 / 50

43. Which relation connects pressure and average kinetic energy of molecules?

44 / 50

44. Which statement about boiling and evaporation is correct?

45 / 50

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

46 / 50

46. Which of the following mixtures obeys Avogadro’s law most accurately?

47 / 50

47. Which postulate of the kinetic molecular theory explains the pressure exerted by gases?

48 / 50

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

49 / 50

49. The minimum point in a vs curve (below unity) corresponds to:

50 / 50

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

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Practice States of Matter MCQs
Download Class 11 Chemistry MCQ Study Bundle

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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