This particle model shows the particles in iron.
What state does this particle model represent?
Gas
Liquid
Plasma
Solid
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This particle model shows the particles in iron.
What state does this particle model represent?
Gas
Liquid
Plasma
Solid
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Substances can exist in three states of matter.
What is change of state Y called?
Condensing
Evaporating
Freezing
Melting
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Which of these is a physical change?
Burning wood
Melting wax
Neutralising an acid
Rusting iron
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Substances exist as solids, liquids or gases.
What change of state occurs at Y?
Melting
Freezing
Boiling
Condensation
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Which term is a correct description of ice turning from a solid to a liquid?
Chemical change
Evaporation
Freezing
Physical change
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Where is most of the mass found in an atom?
Electrons
Neutrons
Nucleus
Protons
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Which of the following is not a chemical change?
Iron railings becoming rusty
Burning a piece of wood
Neutralising an acid with alkali
Dissolving salt in water
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A gas can be represented using the following model.
Which of the following is not a limitation of the particle model?
The shape of the particles is not considered
The space between the particles is proportionate to the size of the particles
The particles are assumed to be solid
There are no forces shown between the particles
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Substance Y melts at -101 oC and boils at -35 oC.
What is the state of substance Y at at -110 oC?
Solid
Liquid
Gas
Aqueous
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Solids, liquids and gases have different properties due to the arrangement of their particles.
Which statement is not a property of a liquid?
Particles are close together in a random arrangement
Cannot be be compressed as no space between particles
Have a fixed volume but not a fixed shape
Particles have no forces between them and can move in all directions
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What is the best description of the particles in a liquid?
Distance between particles | Movement of particles | |
A | Close together | in continuous random motion |
B | Close together | vibrating about a fixed point |
C | Far apart | in continuous random motion |
D | Far apart | vibrating about a fixed point |
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The diagram shows a 3D space filling model of methane.
What are the limitations of showing methane as a 3D space filling model?
It does not show how close together the atoms are.
It does not show how many electrons are in a bond.
It does not show the relative size of the atoms.
It does not show the relative volume that the atoms take up.
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Substance Z has a melting point of -7 oC and boiling point of 59 oC.
What is the the state of Z at 0 oC and 100 oC?
State at 0 oC | State at 100 oC | |
A | solid | gas |
B | gas | liquid |
C | liquid | solid |
D | liquid | gas |
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During the phase change from liquid to gas at the boiling point, which statement about the particles is not correct?
The average kinetic energy of the particles increases.
The particles gain enough energy to overcome all intermolecular forces.
The particles maintain their random arrangement but become further apart.
The particles maintain a constant temperature during the phase change.
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Why does a liquid not maintain a fixed shape but maintain a fixed volume?
The particles have no forces between them.
The particles can move freely.
The particles slide past each other while maintaining contact.
The particles vibrate in fixed positions.
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Which of the following best describes a limitation of using the particle model to represent changes of state?
The model suggests particles have strong forces between them at all times.
It assumes particles change size when they change state.
The model does not accurately show the forces of attraction between particles.
It suggests particles are large and have a fixed shape.
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Chemical changes differ from physical changes as shown by:
A change in the arrangement of atoms causing a greater distance between particles.
A change in the arrangement of atoms resulting in new chemical properties.
An increase in the distance between particles causing a change of state.
A change in the distance between particles resulting in no change in the particles.
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