O LevelChemistryCambridgeTopic Questions1. States of Matter1.1 Solids, Liquids and Gases

Solids, Liquids and Gases (Cambridge O Level Chemistry)

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11 mark

Many chemical processes involve substances in either the liquid or the gaseous state.

Which of the following statements is correct?

  • A specific mass of a gas has a fixed volume at room temperature

  • A specific mass of a liquid has a fixed volume at room temperature

  • 25 cm3 of gas contains more particles than 25 cm3 of liquid

  • Liquid particles placed inside a sealed container have fixed positions

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21 mark

Four substances are shown below. 

In which of these substances are the particles close together and moving slowly past each other?

  • Ice

  • Air

  • Steam

  • Water

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3
Sme Calculator1 mark

Which words complete the gaps 1 & 2 in these sentences?

As the temperature of air in a balloon ............1.............. the volume increases. When the volume of air in a balloon increases the pressure ...............2...................

  1 2
 A increases increases
 B increases decreases
 C decreases increases
 D decreases decreases

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11 mark

The kinetic theory of matter explores the spatial relationship between the particles in solids, liquids and gases.

Which of the following processes causes the distance between particles to increase by the most?

  • Melting

  • Freezing

  • Vaporising

  • Condensation

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21 mark

A student closed the lid tightly on an empty metal container which was used for paint. She heated the container over a Bunsen burner on a low flame for a few moments and observed the sides and top of the container bend outwards slightly.

She then turned off the burner and allowed the container to cool.

Which statement explains her observations?

  • The heat increased the pressure inside the container

  • The heat deformed the metal which then bent

  • The heat made the container reduce in size

  • More air particles entered the container

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11 mark

The following four statements describe the arrangement of particles in a substance.

1

Particles are moving in all directions

2

Particles are arranged in neat rows

3

Particles can move past each other

4

Particles vibrate about their positions

Which of the four statements describe the arrangement of particles in a solid?

A        1 and 2               B        2 and 4               C        1 and 3               D        2 only

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21 mark

The diagram shows a cup of hot chocolate made which was prepared by mixing boiling water with chocolate powder.

M0vngQ7d_q2-1-1-mcq-medium-cie-igcse-che

Which row correctly describes the particles of water in the air above the cup compared to those in the hot chocolate drink inside the cup?

  Particles move faster Particles are closer together
A ✓

✓
B ✓

cross times
C cross times

✓
D cross times

cross times

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31 mark

Substance X can occur in three different physical states as shown in the diagram.

q4-1-1-mcq-medium-cie-igcse-che

Which statement is correct?

  •  In state 1 the particles vibrate around fixed positions but don't move

  • Diffusion occurs in the phase change from state 1 to 2

  • The volume of the substance in state 3 is fixed

  • Condensation occurs in the phase change from state 3 to 2

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41 mark

Matter exists in three states which are solid, liquid and gas. Phase changes occur when matter changes from one state to another.

In which changes do the particles move closer together?

gas   rightwards harpoon over leftwards harpoon from 3 to 1 of  liquid   rightwards harpoon over leftwards harpoon from 4 to 2 of  solid

  •  3 and 4

  •  1 and 3

  • 4 only

  • 1 and 2

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51 mark

Stearic acid has a melting point of 69 °C.

 q1-cie-o-level-chemistry-specimen-2023-paper-1

A heated sample of pure stearic acid is cooled and the temperature is recorded every minute for 30 minutes. A graph of the results is shown.

Which process occurs between 8 and 12 minutes?

  • boiling

  • condensing

  • freezing

  • melting

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61 mark

Which statements are correct?

1 The volume of a gas at constant pressure increases as the temperature increases.
2

When the pressure of a gas is increased the particles move closer together.
3 The pressure of a gas at constant volume decreases as the temperature increases.

  • 1, 2 and 3

  • 1 and 2 only

  • 1 and 3 only

  • 2 and 3 only

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