Kinetic particle model of matter — Paper 2 · IGCSE Sciences - Co-ordinated (Double) 0654

32 A gas trapped in a cylinder has volume V. The pressure of the gas increases from P to 4P at constant temperature. What is the new volume of the gas? A 0.25V B 0.50V C 2V D 4V

1 marks

Answer: A

This question in 0654/21 May/June 2017

32 A gas is trapped in a sealed container of constant volume. The gas molecules collide with the container walls to produce a pressure. The temperature of the gas increases. This causes the pressure of the gas to increase. Which row explains why the pressure increases, in terms of the gas molecules? speed of number of collisions molecules each second A increases increases B increases remains constant C remains constant increases D remains constant remains constant

1 marks

Answer: A

This question in 0654/22 May/June 2017

32 Water in a beaker is heated in a laboratory. Which statement about boiling and evaporation of the water is correct? A Boiling and evaporation both occur at any temperature. B Boiling only occurs at the surface of water. C Evaporation only occurs at one temperature. D Evaporation only occurs at the surface of water.

1 marks

Answer: D

This question in 0654/22 Oct/Nov 2017

30 The pressure P of a fixed mass of gas at constant temperature depends on its volume V. What is the relationship between P and V ? A P is directly proportional to V. B P is directly proportional to V 2. C P is inversely proportional to V. D P is inversely proportional to V 2.

1 marks

Answer: C

This question in 0654/23 Oct/Nov 2017

32 Two substances X and Y are in different states. Substance X has a definite shape and has a definite volume. Substance Y has no definite shape but has a definite volume. Which row gives the state of each substance? substance X substance Y A solid liquid B solid gas C liquid solid D liquid gas

1 marks

Answer: A

This question in 0654/21 Oct/Nov 2018

31 When evaporation occurs, molecules escape from the surface of a liquid. Which molecules escape, and what happens to the average speed of the molecules remaining in the liquid? average speed of escaping molecules remaining molecules A less energetic decreases B less energetic increases C more energetic decreases D more energetic increases

1 marks

Answer: C

This question in 0654/21 May/June 2019

31 When equal masses of solids, liquids and gases are heated equally, they expand by different amounts. Which list shows the relative order of the magnitudes of the expansion, starting with the state of matter that expands the least? A gas, liquid, solid B liquid, gas, solid C liquid, solid, gas D solid, liquid, gas

1 marks

Answer: D

This question in 0654/22 May/June 2019

32 A fixed mass of gas is trapped in a container of constant volume. container fixed mass of gas The gas is now heated. How does the pressure of the gas change and how does the speed of the gas molecules change? pressure of gas speed of molecules A decreases decreases B decreases increases C increases decreases D increases increases

1 marks

Answer: D

This question in 0654/23 May/June 2019

32 The more energetic molecules of a liquid are escaping from its surface, causing the liquid to cool. What is happening to the liquid? A It is boiling. B It is condensing. C It is evaporating. D It is melting.

1 marks

Answer: C

This question in 0654/21 Oct/Nov 2019

31 Which statement about evaporation of a liquid is correct? A Evaporation causes heating of the liquid. B Evaporation has no effect on the temperature of the liquid. C Evaporation is the result of the less-energetic molecules escaping from the surface of the liquid. D Evaporation occurs more quickly if the surface area of the liquid is increased.

1 marks

Answer: D

This question in 0654/22 Oct/Nov 2019

32 A fixed mass of gas is trapped in a cylinder by a piston, as shown. The volume of the gas is increased at constant temperature by moving the piston to the right, as shown. cylinder piston trapped gas What effect does this have on the average speed of the molecules and on how many collisions are made by the molecules with the piston each second? average speed number of collisions of molecules each second A increases decreases B increases increases C unchanged decreases D unchanged increases

1 marks

Answer: C

This question in 0654/22 Feb/March 2021

32 Which labelled arrow on the diagram represents condensation? A liquid gas B C D solid

1 marks

Answer: A

This question in 0654/21 Oct/Nov 2021

33 A sealed cylinder contains gas. The average speed of the molecules of the gas increases but the average distance between them remains the same. How does this affect the pressure of the gas and its volume? pressure volume A decreases increases B decreases no change C increases increases D increases no change

1 marks

Answer: D

This question in 0654/21 Oct/Nov 2021

33 Which labelled arrow on the diagram represents condensation? A liquid gas B C D solid

1 marks

Answer: A

This question in 0654/22 Oct/Nov 2021

32 Which labelled arrow on the diagram represents condensation? A liquid gas B C D solid

1 marks

Answer: A

This question in 0654/23 Oct/Nov 2021

33 Equal volumes of a gas, a liquid and a solid are heated through the same temperature difference at constant pressure. Which statement about their expansions is correct? A The gas expands the most. B The liquid expands the most. C The solid expands the most. D The gas, the liquid and the solid all expand by the same amount.

1 marks

Answer: A

This question in 0654/21 Oct/Nov 2022

35 The speeds of sound in three different states of the same substance are 480 m / s, 1500 m / s and 1800 m / s. Which row gives the state for each of these speeds? 480 m / s 1500 m / s 1800 m / s A gas liquid solid B gas solid liquid C solid gas liquid D solid liquid gas

1 marks

Answer: A

This question in 0654/22 Oct/Nov 2022

33 A fixed mass of gas is trapped in a container. The temperature of the gas is increased but the volume of the container does not change. How do the kinetic energy of the molecules and the pressure of the gas change? kinetic energy pressure A decreases decreases B decreases increases C increases decreases D increases increases

1 marks

Answer: D

This question in 0654/23 Oct/Nov 2022

31 Some gas is put in a sealed metal container of constant volume. The gas is now cooled. What happens to the average speed of the gas molecules, and what happens to the pressure of the gas? average speed pressure of gas of molecules A decreases decreases B decreases increases C increases decreases D increases increases

1 marks

Answer: A

This question in 0654/22 Feb/March 2023

32 Which statement about gas particles is not correct? A Increasing the temperature of a gas makes the gas particles move more slowly. B The gas particles are in constant random motion. C The pressure of a gas is caused by the collision of gas particles with the container. D Very small particles suspended in a gas are in constant random motion.

1 marks

Answer: A

This question in 0654/22 May/June 2023

32 The diagrams represent the arrangement of molecules in three states of matter. Arrows P and Q represent two changes of state. P Q Which row identifies the changes of state? P Q A evaporation condensation B evaporation solidification C melting condensation D melting solidification

1 marks

Answer: B

This question in 0654/23 May/June 2023

32 The pressure of a gas in a container is caused by gas molecules colliding with the walls. The pressure can be increased by heating the gas or by reducing its volume. Which row explains why the pressure increases in each case? heating the gas reducing the volume A collisions more frequent and harder collisions more frequent and harder B collisions more frequent and harder collisions more frequent only C collisions harder only collisions more frequent and harder D collisions harder only collisions more frequent only

1 marks

Answer: B

This question in 0654/23 Oct/Nov 2023

31 The more energetic molecules of a liquid are escaping from its surface, causing the liquid to cool. What is happening to the liquid? A It is boiling. B It is condensing. C It is evaporating. D It is melting.

1 marks

Answer: C

This question in 0654/22 Feb/March 2024

32 When solids, liquids and gases are heated, they expand. What is the order of the expansions of solids, liquids and gases, from smallest to largest? A gas  liquid  solid B liquid  gas  solid C solid  gas  liquid D solid  liquid  gas

1 marks

Answer: D

This question in 0654/22 Feb/March 2024

32 A gas in a balloon is heated at constant pressure. What happens to the gas? A Its density decreases. B Its mass decreases. C Its temperature decreases. D Its volume decreases.

1 marks

Answer: A

This question in 0654/23 May/June 2024

32 A student observes that a substance X does not flow. Which statement about substance X is correct? A It can be either a gas or a liquid. B It can only be a gas. C It can only be a liquid. D It can only be a solid.

1 marks

Answer: D

This question in 0654/21 Oct/Nov 2024

31 A liquid starts to evaporate. Which molecules escape and what happens to the temperature of the remaining liquid? molecules temperature of that escape remaining liquid A less-energetic decreases B less-energetic increases C more-energetic decreases D more-energetic increases

1 marks

Answer: C

This question in 0654/22 Oct/Nov 2024

31 A sample of gas is sealed inside a container. The volume of the container is slowly decreased. The temperature of the gas remains constant. Which row describes and explains what happens to the pressure of the gas? description explanation A pressure decreases molecules collide with the container at lower speed B pressure decreases molecules collide with the container less frequently C pressure increases molecules collide with the container at greater speed D pressure increases molecules collide with the container more frequently

1 marks

Answer: D

This question in 0654/23 Oct/Nov 2024

31 Gas is trapped in a container. The piston is moved to the right. The temperature of the gas does not change. gas piston moved to the right Which statement about the gas is correct? A The kinetic energy of the gas particles decreases. B The kinetic energy of the gas particles increases. C The pressure of the gas decreases. D The pressure of the gas increases.

1 marks

Answer: C

This question in 0654/22 Feb/March 2025

31 Which statement explains why smoke particles are made to move by other particles in Brownian motion? A The other particles are larger and move faster than smoke particles. B The other particles are larger and move slower than smoke particles. C The other particles are smaller and move faster than smoke particles. D The other particles are smaller and move slower than smoke particles.

1 marks

Answer: C

This question in 0654/21 May/June 2025

32 Liquid water boils at 100 °C to produce steam. The volume of the steam at 100 °C is much greater than the volume of the liquid water. Which statement explains the increase in volume at 100 °C? A The water molecules move faster in steam than in liquid water. B The water molecules are further apart in steam than in liquid water. C The water molecules are larger in steam than in liquid water. D The water molecules are regularly arranged in liquid water but are randomly arranged in steam.

1 marks

Answer: B

This question in 0654/22 May/June 2025

31 Boiling is a process in which a liquid changes its state to become a gas. Which row describes the temperature at which boiling takes place and where it takes place in a pure liquid? temperature where it takes place A at a definite temperature only at the surface of the liquid B at a definite temperature throughout the liquid C at any temperature only at the surface of the liquid D at any temperature throughout the liquid

1 marks

Answer: B

This question in 0654/21 Oct/Nov 2025

31 The temperature of a liquid in a beaker decreases because particles escape from the surface of the liquid. Which row gives the name of this process and shows which particles escape from the liquid? particles that name of process escape A condensation less energetic B condensation more energetic C evaporation less energetic D evaporation more energetic

1 marks

Answer: D

This question in 0654/22 Oct/Nov 2025

31 When a liquid evaporates, particles escape from the surface of the liquid. Which row shows the particles that escape and the average energy of the remaining particles? average energy of particles that escape remaining particles A less energetic particles decreases B less energetic particles stays the same C more energetic particles decreases D more energetic particles stays the same

1 marks

Answer: C

This question in 0654/23 Oct/Nov 2025