Class 11 Chemistry Chapter 5 – States and Phases of Matter MCQs | FBISE | Grade 11 Chemistry

Description: Practice 50 exam-oriented MCQs from Class 11 Chemistry Chapter 5 – States and Phases of Matter, covering gases, gas laws, kinetic molecular theory, liquids, solids, intermolecular forces, phase changes, and properties of matter.

1. The three common physical states of matter are

A) solid, liquid and gas
B) atom, ion and molecule
C) metal, non-metal and metalloid
D) acid, base and salt
2. A solid has a definite

A) shape only
B) shape and volume
C) volume only
D) neither shape nor volume
3. A liquid has a definite

A) neither shape nor volume
B) shape but no fixed volume
C) volume but no fixed shape
D) mass but no volume
4. A gas has

A) fixed shape only
B) fixed shape and volume
C) fixed volume only
D) neither fixed shape nor fixed volume
5. Particles in a solid are generally

A) closely packed and vibrate about fixed positions
B) far apart and move freely
C) completely motionless
D) ionized
6. Particles in a gas are generally

A) closely packed in fixed positions
B) far apart and move randomly
C) arranged in a regular lattice
D) motionless
7. The intermolecular forces in gases are generally

A) absent in every case
B) strongest of all states
C) weak compared with those in liquids and solids
D) equal to nuclear forces
8. The kinetic energy of particles is most directly related to

A) density only
B) mass number
C) atomic number
D) temperature
9. According to kinetic molecular theory, gas particles are assumed to be in

A) continuous random motion
B) complete rest
C) fixed positions
D) circular orbits
10. The pressure exerted by a gas results mainly from

A) attraction between nuclei
B) collisions of gas particles with container walls
C) particle color
D) chemical bonding only
11. The SI unit of pressure is the

A) newton
B) joule
C) pascal
D) kelvin
12. Standard atmospheric pressure is approximately

A) 100 atm
B) 10 atm
C) 0.01 atm
D) 1 atm
13. One atmosphere is approximately equal to

A) 760 mmHg
B) 76 mmHg
C) 7.6 mmHg
D) 7600 mmHg
14. Boyle’s law relates pressure and volume at constant

A) pressure
B) temperature
C) volume
D) amount of heat
15. According to Boyle’s law, at constant temperature, pressure is

A) equal to volume
B) directly proportional to volume
C) inversely proportional to volume
D) independent of volume
16. Charles’s law relates volume and temperature at constant

A) density only
B) volume
C) mass only
D) pressure
17. According to Charles’s law, gas volume is directly proportional to

A) absolute temperature
B) pressure
C) density
D) molar mass
18. Temperature used in gas-law calculations should commonly be expressed in

A) celsius only
B) kelvin
C) fahrenheit only
D) joules
19. The Kelvin temperature scale begins at

A) room temperature
B) the boiling point of water
C) absolute zero
D) the freezing point of water
20. Absolute zero is approximately

A) -100 K
B) 100 K
C) 273 K
D) 0 K
21. Gay-Lussac’s law relates pressure and absolute temperature at constant

A) volume
B) pressure
C) temperature
D) mass only
22. At constant volume, gas pressure is directly proportional to

A) volume
B) absolute temperature
C) molar mass
D) density only
23. Avogadro’s law states that at constant temperature and pressure, gas volume is proportional to

A) temperature only
B) pressure
C) amount of gas
D) molar mass
24. One mole of an ideal gas contains approximately

A) 9.81 × 10^23 particles
B) 6.022 × 10^10 particles
C) 3.011 × 10^23 particles
D) 6.022 × 10^23 particles
25. The ideal gas equation is

A) PV = nRT
B) P = nVRT
C) PV = RT/n
D) PVT = n/R
26. In the ideal gas equation, R represents the

A) radius of the atom
B) gas constant
C) reaction rate
D) relative density
27. The molar volume of an ideal gas at STP is approximately

A) 224 L mol−1
B) 2.24 L mol−1
C) 22.4 L mol−1
D) 0.224 L mol−1
28. A gas that closely follows the ideal gas equation under specified conditions is called an

A) aqueous gas
B) ionic gas
C) metallic gas
D) ideal gas
29. Real gases deviate most from ideal behavior at

A) high pressure and low temperature
B) low pressure and high temperature
C) high temperature only
D) low pressure only
30. Real gases can be liquefied more readily by

A) increasing temperature only
B) lowering temperature and increasing pressure
C) decreasing pressure only
D) removing all intermolecular forces
31. The compressibility of gases is mainly due to

A) fixed particle positions
B) strong ionic bonds
C) large spaces between particles
D) large particle masses only
32. Diffusion is the spontaneous mixing of particles due to

A) electrolysis
B) gravity alone
C) chemical bonding
D) random molecular motion
33. Graham’s law relates the rate of diffusion of a gas to its

A) molar mass
B) atomic number only
C) boiling point only
D) color
34. According to Graham’s law, a lighter gas generally diffuses

A) slower than a heavier gas
B) faster than a heavier gas
C) at the same rate in all cases
D) only under pressure
35. Viscosity is a measure of a fluid’s resistance to

A) freezing
B) evaporation
C) flow
D) compression only
36. Surface tension results mainly from

A) ionic radiation
B) repulsion between nuclei
C) gas pressure only
D) cohesive forces between liquid molecules
37. A liquid with strong intermolecular forces generally has a

A) higher boiling point
B) lower boiling point in every case
C) zero surface tension
D) higher vapor pressure
38. Vapor pressure is the pressure exerted by

A) a solid on a gas
B) vapor in equilibrium with its liquid
C) a gas at absolute zero
D) a crystal lattice
39. At the boiling point, the vapor pressure of a liquid equals

A) internal nuclear pressure
B) zero pressure
C) external pressure
D) one pascal
40. Evaporation occurs

A) only below absolute zero
B) throughout a solid only
C) only at the boiling point
D) at the surface of a liquid
41. Evaporation causes cooling because

A) higher-energy particles escape from the liquid
B) all particles lose energy equally
C) the liquid gains heat from particles
D) molecules become heavier
42. A solid changing directly into a gas is called

A) deposition
B) sublimation
C) condensation
D) fusion
43. A gas changing directly into a solid is called

A) vaporization
B) sublimation
C) deposition
D) melting
44. The change from solid to liquid is called

A) sublimation
B) freezing
C) condensation
D) melting or fusion
45. The change from liquid to solid is called

A) freezing
B) melting
C) vaporization
D) deposition
46. The change from gas to liquid is called

A) evaporation
B) condensation
C) fusion
D) sublimation
47. The change from liquid to gas is called

A) deposition
B) freezing
C) vaporization
D) condensation
48. The temperature at which a solid changes to a liquid is its

A) triple point
B) boiling point
C) critical temperature
D) melting point
49. The temperature above which a gas cannot be liquefied by pressure alone is called

A) critical temperature
B) melting point
C) boiling point
D) freezing point
50. The triple point is the condition at which

A) only solid exists
B) solid, liquid and gas phases coexist in equilibrium
C) only gas exists
D) a liquid boils at any pressure


Class 11 Chemistry Chapters

Syllabus & SLO Alignment

This chapter follows the FBISE HSSC-I Chemistry Assessment Framework based on the National Curriculum of Pakistan 2022–23. The relevant SLO range for this chapter is C-11-B-61 to C-11-B-74. The SLOs cover the chapter content and include the learning outcomes identified by FBISE for this content area. Summative/formative status follows the official assessment framework.

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top