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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 of the following correctly arranges intermolecular forces in increasing order of strength?

2 / 30

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

3 / 30

3. Which factor does not directly affect viscosity of liquids?

4 / 30

4. Surface tension is measured in SI units as:

5 / 30

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

6 / 30

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

7 / 30

7. Which of the following correctly represents enthalpy of sublimation ()?

8 / 30

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

9 / 30

9. Which curve best represents isothermal compression of a gas?

10 / 30

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

11 / 30

11. Which real-life application is based on the concept of viscosity?

12 / 30

12. 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:

13 / 30

13. Which change of state explains the working of solid air fresheners (naphthalene balls)?

14 / 30

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

15 / 30

15. What volume will mol occupy at and ?

16 / 30

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

17 / 30

17. A mixture of H₂ and O₂ is allowed to diffuse through a porous plug. If mixture contains equal masses of both gases, what is the ratio of their diffusion rates?

18 / 30

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

19 / 30

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

20 / 30

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

21 / 30

21. If the molar mass of oxygen is 32 g/mol, what is the RMS speed at 300 K?

22 / 30

22. Dalton’s law can be combined with the ideal gas equation to give:

23 / 30

23. A scuba tank has 10 L volume and contains O₂ at 150 atm, 300 K. How many grams of O₂ are present? (R = 0.0821).

24 / 30

24. 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)

25 / 30

25. Order the intermolecular forces from weakest to strongest:

26 / 30

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

27 / 30

27. Graham’s law of diffusion states that the rate of diffusion of a gas is:

28 / 30

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

29 / 30

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

30 / 30

30. When ammonia and hydrogen chloride gases diffuse toward each other, a white ring of forms closer to HCl because:

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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

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 real-life application uses cholesteric liquid crystals?

2 / 50

2. Surface tension of a liquid is defined as:

3 / 50

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

4 / 50

4. At the same temperature and pressure, which of the following gases will have the same volume if they contain equal number of molecules?

5 / 50

5. 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?

6 / 50

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

7 / 50

7. The isotropic liquid phase differs from liquid crystal phases because:

8 / 50

8. How does viscosity of gases change with temperature?

9 / 50

9. Which state of matter has definite volume but no definite shape?

10 / 50

10. Which of the following molecules will have the strongest dipole–dipole interactions?

11 / 50

11. The critical volume () is:

12 / 50

12. A gas mixture contains 4 g of H₂ and 64 g of O₂ at 300 K in a 10 L container. Find the total pressure. ().

13 / 50

13. Why does the pressure inside a car tire increase when the car is driven for a long distance?

14 / 50

14. At very low pressures, the compressibility factor of real gases approaches unity because:

15 / 50

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

16 / 50

16. Which expression correctly represents Avogadro’s law?

17 / 50

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

18 / 50

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

19 / 50

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

20 / 50

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

21 / 50

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

22 / 50

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

23 / 50

23. The van der Waals equation for real gases is:

24 / 50

24. Which of the following will have greater thermal energy at the same temperature?

25 / 50

25. Boyle’s law fails at:

26 / 50

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

27 / 50

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

28 / 50

28. Which additional application of supercritical fluids is correct?

29 / 50

29. Which intermolecular force plays the major role in dissolving NaCl in water?

30 / 50

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

31 / 50

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

32 / 50

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

33 / 50

33. Why is knowledge of important in industry?

34 / 50

34. As temperature of a gas increases at constant volume, what happens to the molecular motion?

35 / 50

35. Which gas shows the greatest deviation from ideal behavior?

36 / 50

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

37 / 50

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

38 / 50

38. Thermal energy of a system is defined as:

39 / 50

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

40 / 50

40. A balloon has a volume of 2.5 L at 20°C. At what temperature will it occupy 5.0 L, assuming pressure is constant?

41 / 50

41. Which molecular motion dominates in solids?

42 / 50

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

43 / 50

43. For a real gas, indicates:

44 / 50

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

45 / 50

45. What causes dipole–dipole interaction strength to increase?

46 / 50

46. If a gas mixture contains 3 mol of , 1 mol of , and 2 mol of , and total pressure is 6 atm, what is the partial pressure of ?

47 / 50

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

48 / 50

48. 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 ?

49 / 50

49. Which gas law relates pressure and volume at constant temperature?

50 / 50

50. 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)?

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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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