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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 coefficient of volume expansion is generally in the order:

2 / 30

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

3 / 30

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

4 / 30

4. Vapour pressure of a liquid is defined as:

5 / 30

5. At absolute zero, molecular motion is:

6 / 30

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

7 / 30

7. 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?

8 / 30

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

9 / 30

9. Gay Lussac’s law states that for a fixed mass of gas at constant volume:

10 / 30

10. Which compound has the highest boiling point due to intermolecular forces?

11 / 30

11. 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:

12 / 30

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

13 / 30

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

14 / 30

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

15 / 30

15. Effusion of a gas refers to:

16 / 30

16. A 5 L container has a mixture of 2 mol of O₂ and 3 mol of N₂ at 300 K. Calculate the total pressure of the gas mixture. ( L·atm·K⁻¹·mol⁻¹)

17 / 30

17. In liquids, compared to solids, molecules exhibit:

18 / 30

18. Which of the following liquids has the highest vapour pressure at 25 °C?

19 / 30

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

20 / 30

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

21 / 30

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

22 / 30

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

23 / 30

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

24 / 30

24. Which property makes supercritical fluids useful as solvents in industry?

25 / 30

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

26 / 30

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 / 30

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

28 / 30

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

29 / 30

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

30 / 30

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

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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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Get new questions with every attempt

  • 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 type of liquid crystal phase is most widely used in LCD technology?

2 / 50

2. Why is the critical temperature () important in the liquefaction of gases?

3 / 50

3. What is the effect of decreasing temperature on molecular motion in a liquid?

4 / 50

4. Why does graphite have a very high melting point?

5 / 50

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

6 / 50

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

7 / 50

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

8 / 50

8. If gas A has molar mass 4 and gas B has molar mass 64, the ratio of their diffusion rates () is:

9 / 50

9. Which real-life example demonstrates Gay Lussac’s law?

10 / 50

10. Which of the following is an example of thermal energy dominating over intermolecular forces?

11 / 50

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

12 / 50

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

13 / 50

13. Which gas is easiest to liquefy based on its critical temperature?

14 / 50

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

15 / 50

15. The supercritical fluid region in Andrews’ isotherms lies:

16 / 50

16. Which expression correctly represents Avogadro’s law?

17 / 50

17. Which condition favors gaseous state most strongly?

18 / 50

18. 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 ?

19 / 50

19. Viscosity of a liquid is defined as:

20 / 50

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

21 / 50

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

22 / 50

22. Which chemical process explains lowering of vapour pressure in salt water?

23 / 50

23. Charles’ law can be explained using kinetic theory because:

24 / 50

24. The phenomenon of vapour pressure lowering is responsible for:

25 / 50

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

26 / 50

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

27 / 50

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

28 / 50

28. Which relation connects , , and for a van der Waals gas?

29 / 50

29. In which state is surface tension a characteristic, macroscopically measurable property of the bulk phase?

30 / 50

30. Which property makes supercritical fluids useful as solvents in industry?

31 / 50

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

32 / 50

32. The constant obtained in Boyle’s law, , depends on:

33 / 50

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

34 / 50

34. Which statement about densities is correct?

35 / 50

35. Which phenomenon demonstrates surface tension in everyday life?

36 / 50

36. Which statement best explains why salt (NaCl) raises the boiling point of water?

37 / 50

37. The temperature at which a gas theoretically occupies zero volume is called:

38 / 50

38. Unit of viscosity in the CGS system is:

39 / 50

39. Under which conditions does best describe real gases?

40 / 50

40. 2 g of H₂ and 16 g of O₂ are placed in a 5 L vessel at 300 K. What is the total pressure? ().

41 / 50

41. For 1 mole of a gas, the van der Waals equation is:

42 / 50

42. A steel cylinder contains oxygen gas at 10 atm and 300 K. If the cylinder is heated to 600 K without changing volume, what will be the new pressure?

43 / 50

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

44 / 50

44. What happens to a liquid when intermolecular forces and thermal energy are nearly equal?

45 / 50

45. In an experiment, two gases diffuse through the same pinhole. If gas A takes 36 s and gas B takes 64 s, the ratio of their molar masses () is:

46 / 50

46. The coefficient of viscosity is related to viscous drag force by the equation:

47 / 50

47. Why do liquid crystals exhibit anisotropy in electrical and optical properties?

48 / 50

48. In human respiration, expansion of the chest cavity decreases pressure inside lungs. Which law explains air entering the lungs?

49 / 50

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

50 / 50

50. The critical volume () 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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