States of Matter

Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.

Kinetic particle theory

Subtopic

Kinetic particle theory under States of Matter for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

1.
$Which of the following conditions would result in the fastest rate of diffusion for a gas?$
A. $High temperature and high molecular mass$
B. $Low temperature and high molecular mass$
C. $Low temperature and low molecular mass$
D. $High temperature and low molecular mass$
2.
$In the context of Brownian motion, why do smoke particles observed under a microscope move in an unpredictable, random zigzag fashion?$
A. $They are being hit by larger, visible dust particles.$
B. $The smoke particles are reacting chemically with the air.$
C. $They are being bombarded by fast-moving, invisible air molecules.$
D. $Convection currents in the air push them in different directions.$
3.
$The diagram shows the changes of state for a substance. What is the name of the process labeled 'X'?$
A. $Evaporation$
B. $Condensation$
C. $Sublimation$
D. $Melting$

Download the worksheet for States of Matter - Kinetic particle theory to practice offline. It includes additional chapter-level practice questions.

Diffusion

Subtopic

Diffusion under States of Matter for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

1.
$Which statement explains why gases diffuse faster than liquids?$
A. $Gas particles have more mass than liquid particles.$
B. $Gas particles have more space between them and move at higher velocities.$
C. $Liquid particles are not in constant motion.$
D. $Gas particles are attracted to each other more strongly than liquid particles.$
2.
$In which state of matter does diffusion occur the fastest under standard conditions?$
A. $Solids$
B. $Liquids$
C. $Gases$
D. $Diffusion occurs at the same rate in all states$
3.
$Which of the following best defines diffusion?$
A. $The movement of particles from an area of low concentration to high concentration.$
B. $The movement of particles through a semi-permeable membrane only.$
C. $The net movement of particles from a region of higher concentration to a region of lower concentration.$
D. $The process of solid particles turning directly into a gas.$

Download the worksheet for States of Matter - Diffusion to practice offline. It includes additional chapter-level practice questions.

Changes of state

Subtopic

Changes of state under States of Matter for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

1.
$What happens to the temperature of a pure crystalline solid while it is melting?$
A. $It increases because energy is being added.$
B. $It decreases because melting is an endothermic process.$
C. $It remains constant until all the solid has turned into liquid.$
D. $It fluctuates depending on the external pressure.$
2.
$In the following sequence of changes for a substance, what is the name of the process labeled 'B'?$
A. $Melting$
B. $Freezing$
C. $Condensing$
D. $Boiling$
3.
$According to the kinetic particle theory, which statement best describes the movement of particles in a liquid?$
A. $Particles vibrate about fixed positions in a regular lattice.$
B. $Particles move randomly at very high speeds and are far apart.$
C. $Particles are close together and slide over each other in a random manner.$
D. $Particles are stationary and have no kinetic energy.$

Download the worksheet for States of Matter - Changes of state to practice offline. It includes additional chapter-level practice questions.

States of Matter - Grade 12 Chemistry (IGCSE) | Krit.club