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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. 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 / 30

2. A balloon filled with air at 1 atm has a volume of 2.5 L. If the balloon is squeezed until volume becomes 1.25 L, the new pressure inside will be:

3 / 30

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

4 / 30

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

5 / 30

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

6 / 30

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

7 / 30

7. Why does water have a much higher boiling point than hydrogen sulfide ()?

8 / 30

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

9 / 30

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

10 / 30

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

11 / 30

11. At what temperature will the average kinetic energy of oxygen molecules be twice that at 300 K?

12 / 30

12. What happens to the motion of particles when a solid melts into a liquid?

13 / 30

13. Which gas behaves most ideally under ordinary conditions?

14 / 30

14. A sample of hydrogen gas is collected over water at 25°C. If total pressure is 760 mmHg and vapor pressure of water is 24 mmHg, what is the pressure of hydrogen?

15 / 30

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

16 / 30

16. The critical volume () refers to:

17 / 30

17. The ratio of diffusion rates of NH₃ (M = 17) and HCl (M = 36.5) is approximately:

18 / 30

18. 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?

19 / 30

19. Which condition leads to higher total thermal energy?

20 / 30

20. If molecules of mass are in a volume , which expression gives pressure?

21 / 30

21. Which interaction explains the high solubility of salts in water?

22 / 30

22. Why are liquid crystals important in modern technology?

23 / 30

23. Which factor mainly affects the rate of evaporation of a liquid?

24 / 30

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

25 / 30

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

26 / 30

26. Which equation represents the ideal gas law?

27 / 30

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

28 / 30

28. Which property of nematic liquid crystals is primarily exploited in LCD screens?

29 / 30

29. The reason noble gases show an increasing trend in boiling point down the group is:

30 / 30

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

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

2 / 50

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

3 / 50

3. The reason noble gases show an increasing trend in boiling point down the group is:

4 / 50

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

5 / 50

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

6 / 50

6. A mixture of gases contains 2 mol and 1 mol . If the total pressure is 9 atm, the partial pressure of helium is:

7 / 50

7. Which gas shows the largest negative deviation () under ordinary conditions?

8 / 50

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

9 / 50

9. Which property of gases is explained by Graham’s law?

10 / 50

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

11 / 50

11. Why do small liquid drops form spherical shapes?

12 / 50

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

13 / 50

13. Boyle’s law fails at:

14 / 50

14. At 100°C, the vapour pressure of water is:

15 / 50

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

16 / 50

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

17 / 50

17. If the pressure of a fixed mass of gas is plotted against its reciprocal of volume (1/V), the graph is:

18 / 50

18. Which important conclusion arises from the derivation of the pressure equation?

19 / 50

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

20 / 50

20. At the critical point of a gas:

21 / 50

21. A 2 L container holds O₂ at 27 °C and 2 atm. Calculate the number of moles of O₂. ().

22 / 50

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

23 / 50

23. Two gases diffuse through a porous membrane. If H₂ diffuses 4 times faster than gas X, what is the molar mass of X?

24 / 50

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

25 / 50

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

26 / 50

26. Which condition is essential for the validity of Gay Lussac’s law?

27 / 50

27. The helical arrangement of molecules in cholesteric (chiral nematic) liquid crystals leads to:

28 / 50

28. Which of the following is a major industrial application of supercritical CO₂?

29 / 50

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

30 / 50

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

31 / 50

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

32 / 50

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

33 / 50

33. Which of the following best describes the nematic liquid crystal phase?

34 / 50

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

35 / 50

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

36 / 50

36. Dalton’s law of partial pressures states that:

37 / 50

37. Surface tension decreases with:

38 / 50

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

39 / 50

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

40 / 50

40. A 5 g sample of an unknown gas occupies 2 L at 1 atm and 300 K. Calculate its molar mass.

41 / 50

41. 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?

42 / 50

42. A vessel contains 1 mol of O₂ and 2 mol of H₂ at 300 K. If total pressure = 9 atm, calculate the partial pressure of O₂.

43 / 50

43. Which of the following is assumed to remain constant during molecular collisions in kinetic theory?

44 / 50

44. The temperature at which vapour pressure of a liquid equals atmospheric pressure is called:

45 / 50

45. 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?

46 / 50

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

47 / 50

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

48 / 50

48. Why is knowledge of important in industry?

49 / 50

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

50 / 50

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

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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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