Class 11 Chemistry States of Matter MCQs with Answers

Class 11 Chemistry States of Matter MCQs with Answers serve as a targeted and invaluable resource for Sainik School aspirants preparing for their chemistry exams. These multiple-choice questions are meticulously tailored to the class 11 chemistry syllabus, focusing on the fundamental topic of states of matter. With clear and concise answers provided, students benefit from efficient self-assessment, identifying strengths and areas for improvement. Mastering states of matter is pivotal in understanding various chemical processes, and these MCQs ensure a thorough comprehension of essential concepts.

As students gear up for Sainik School entrance exams, practicing these MCQs not only aids in exam readiness but also enhances critical thinking and problem-solving skills. The content aligns with the broader goals of Sainik School education, emphasizing a holistic understanding of states of matter principles. This resource serves as a strategic tool, helping students build a strong foundation for future academic endeavors and meeting the specific requirements of Sainik School examinations.

Q1. The pressure exerted by the gaseous molecules is due to:

1. The repulsion between gaseous molecules.
2. The attraction between gaseous molecules.
3. Collision of the particles with the walls of the container.
4. Both (a) and (b).

Q2. The gases are easily liquefied when:

1. They are compressed at higher temperature.
2. They are compressed at lower temperature.
3. They are expanded at higher temperature.
4. They are expanded at lower temperature.

Q3. With regard to the gaseous state of matter which of the following statements are correct?

1. Complete order of molecules.
2. Complete disorder of molecules.
3. Random motion of molecules.
4. Fixed position of molecules.

Q4. Critical temperature is the how so ever:

1. Highest temperature above which gas cannot be liquefied.
2. Highest temperature above which gas liquefies.
3. Lowest temperature at which gas liquefies.
4. All of the above.

Q5. By what factor does the average velocity of a gaseous molecules increase when the temperature is doubled?

1. 2
2. 2.8
3. 4.0
4. 1.4

Q6. If Z is a compressibility factor, van der Waals’ equation at low pressure can be written as:

Q7. If a gas expands at constant temperature, it indicates that:

1. Kinetic energy of molecules decreases.
2. Pressure of the gas increases.
3. Kinetic energy of molecules remain the same.
4. Number of molecules of gas increase.

Q8. Critical temperature of H₂O, NH₃ , CO₂ and O₂ are 647K, 405.6K, 304.10K, and 154.2K respectively. If the cooling
starts from 500K to their critical temperature, the gas that liquefies first is:

1. H₂O
2. NH₃
3. CO₂
4. O₂

Q9. The liquefaction behaviour of the temporary gases like CO₂ approaches that of permanent gases like N₂ , O₂ etc.,
as we go:

1. Below critical temperature.
2. Above critical temperature.
3. Above absolute zero.
4. Below absolute zero.

Q10. All gases obey Charle’s law at:

1. Low temperature and high pressure.
2. Low temperature and low pressure.
3. High temperature and high pressure.
4. High temperature and low pressure.

Q11. The density of gas is 1.964g cm^-3 at 273K and 76cm Hg. The gas is:

1. Xe
2. CO₂
3. C₂ H₆
4. CH₄

Q12. Dipole-dipole forces act between the molecules possessing permanent dipole. Ends of dipoles possess ‘partial
charges’. The partial charge is:

1. More than unit electronic charge.
2. Equal to unit electronic charge.
3. Less than unit electronic charge.
4. Double the unit electronic charge.

Q13. The average kinetic energy per molecule of a gas at a given temperature, T is given by:

Q14. The pressure in well inflated tyres of automobiles is almost constant, but on a hot summer day this increases
considerably and tyre may burst. This phenomena is explained by:

1. Boyle’s law.
2. Charle’s law.
3. Gay Lussac’s law.
4. Avogadro’s law.

Q15. The surface tension of which of the following liquid is maximum?

1. C₂ H₅ OH
2. CH₃ OH
3. H₂ O
4. C₆ H₆