States of Matter
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Kinetic particle theory
SubtopicKinetic particle theory under States of Matter for Grade 11 IGCSE.
Preview questions (no answers)
- 1.
What happens to the intermolecular forces when a liquid boils?
A.They become stronger
B.They are completely overcome
C.They stay the same
D.They turn into chemical bonds
- 2.
Which state of matter contains particles that vibrate about fixed positions?
A.Solid
B.Liquid
C.Gas
D.Plasma
- 3.
Why can you smell food cooking in the kitchen while you are in another room?
A.The food particles disappear
B.The gas particles collide and spread out (diffusion)
C.The air carries the food as a solid
D.The food particles are attracted to you
- 4.
In which state of matter are particles arranged randomly but are still touching?
A.Solid
B.Liquid
C.Gas
D.None of these
- 5.
A student adds of ethanol to of water and stirs the mixture. As shown in the diagram, the final volume is instead of the expected . Which statement best explains this observation according to the kinetic particle theory?
A.The particles of both liquids have shrunk in size and occupy less volume.
B.The ethanol particles have reacted chemically with the water particles to form a gas.
C.The particles of one liquid have moved into the spaces between the particles of the other liquid.
D.The particles in the mixture have lost kinetic energy and are now packed more tightly.
- 6.
What happens to the density of most substances when they change from a liquid to a gas at constant pressure?
A.Density increases significantly.
B.Density decreases significantly.
C.Density remains exactly the same.
D.Density first increases then decreases.
- 7.
If gas A has a relative molecular mass of 32 and gas B has a relative molecular mass of 16, which of the following is true?
A.Gas A diffuses twice as fast as gas B.
B.Gas B diffuses faster than gas A.
C.Both gases diffuse at the same rate at the same temperature.
D.Gas A is more likely to sublime than gas B.
- 8.
Diffusion is slower in liquids than in gases. What is the primary reason for this?
A.Liquid particles have no kinetic energy.
B.Liquid particles are much heavier than gas particles.
C.The particles in a liquid are much closer together, leading to many more frequent collisions that impede progress.
D.Attractive forces in liquids are non-existent.
- 9.
Which statement about the particles in a liquid is correct?
A.They are arranged in a regular repeating pattern.
B.They are much further apart than in a solid.
C.They have no forces of attraction between them.
D.They have enough energy to partially overcome the attractive forces of the solid state.
- 10.
When a solid is heated, the particles gain energy and vibrate more. At the melting point, what happens to this energy?
A.It continues to increase the temperature of the solid.
B.It is used to overcome the forces holding the particles in the lattice.
C.It is converted into light energy.
D.It is used to increase the size of the atoms.
Download the worksheet for States of Matter - Kinetic particle theory to practice offline. It includes additional chapter-level practice questions.
Preview questions (no answers)
- 1.
How do gas molecules travel between collisions?
A.In a curved path
B.In a straight line
C.They do not move between collisions
D.In a spiral
- 2.
Which formula correctly represents the gas that diffuses faster than Oxygen ()?
A.B.C.D. - 3.
In a closed system, when diffusion results in a uniform concentration, the system has reached:
A.Boiling point
B.Equilibrium
C.Sublimation
D.Saturation
- 4.
Which substance would you expect to diffuse through a room most quickly if spilled?
A.Liquid water
B.Solid salt
C.Liquid perfume (evaporating)
D.Sugar crystals
- 5.
Which statement about the diffusion of gas and gas is correct at the same temperature?
A.diffuses faster because its molecules have a lower .
B.diffuses faster because its molecules are larger.
C.They diffuse at the same rate because they are both gases.
D.diffuses faster because it is more dense.
- 6.
What is the primary factor that causes the net movement of particles in diffusion to eventually stop?
A.The particles run out of kinetic energy.
B.The temperature of the system drops to absolute zero.
C.The concentration becomes uniform throughout the space.
D.The particles are all attracted to the walls of the container.
- 7.
A mixture of gas A and gas B is placed in a container. If gas A is twice as heavy as gas B, what can be said about their speeds?
A.Gas A is twice as fast as gas B.
B.Gas B is twice as fast as gas A.
C.Gas B is faster than gas A but not twice as fast.
D.They both travel at the same speed.
- 8.
Which of these pairs of gases will diffuse at the most similar rates?
A.and
B.and
C.and
D.and
- 9.
The rate of diffusion of gas is and its molecular mass is . For gas , the values are and . Which equation correctly represents the relationship between these variables?
A.B.C.D. - 10.
When is placed in water, it eventually colors the whole liquid. Which statement correctly describes the equilibrium state?
A.The particles stop moving once the color is uniform
B.The particles continue to move randomly, but there is no net change in concentration
C.The particles settle to the bottom due to gravity
D.The water molecules stop moving and only the ions move
Download the worksheet for States of Matter - Diffusion to practice offline. It includes additional chapter-level practice questions.
States of matter and changes of state
SubtopicStates of matter and changes of state under States of Matter for Grade 11 IGCSE.
Preview questions (no answers)
- 1.
What happens to the attractive forces between particles when a liquid is heated to its boiling point?
A.They become stronger
B.They are completely overcome
C.They remain unchanged
D.They turn into repulsive forces
- 2.
In which state are the particles arranged in a regular, orderly pattern?
A.Liquid
B.Gas
C.Solid
D.Plasma
- 3.
When water vapor touches a cold window and turns into water droplets, what is this called?
A.Evaporation
B.Condensation
C.Sublimation
D.Boiling
- 4.
What happens to the speed of particles in a substance as the temperature increases?
A.They slow down
B.They speed up
C.Their speed stays the same
D.They stop moving
- 5.
If you compare a solid and a liquid of the same substance at the same temperature, which of the following is true?
A.The particles in the liquid have higher average kinetic energy.
B.The particles in the solid have higher average kinetic energy.
C.The average kinetic energy of the particles is the same in both states.
D.The particles in the solid have higher potential energy.
- 6.
Which of the following statements about cooling curves is correct?
A.The temperature falls during condensation.
B.The temperature remains constant during freezing.
C.The particles gain potential energy during the liquid-to-solid transition.
D.A cooling curve always starts from the gas phase.
- 7.
What determines the physical state of a substance at a given temperature and pressure?
A.The size of the atoms only
B.The balance between the kinetic energy of particles and the attractive forces between them
C.The number of protons in the nucleus
D.The reactivity of the substance
- 8.
A substance is heated from to . Its melting point is and its boiling point is . How many plateaus will the heating curve have?
A.None
B.One
C.Two
D.Three
- 9.
Which state of matter is characterized by having both a definite shape and a definite volume?
A.Solid only
B.Solid and Liquid
C.Liquid only
D.Gas only
- 10.
At the same temperature, which of the following gases will have the highest average speed of its molecules?
A.()
B.()
C.()
D.()
Download the worksheet for States of Matter - States of matter and changes of state to practice offline. It includes additional chapter-level practice questions.