Solids, liquids and gases — Paper 2 · IGCSE Chemistry (9-1) 0971

1 A mixture of ice and water is left to stand and the ice melts. Which row describes what happens as the ice is melting? temperature of mixture energy changes A increases average kinetic energy of particles increases B increases energy is used to overcome attractive forces C stays the same average kinetic energy of particles increases D stays the same energy is used to overcome attractive forces

1 marks

Answer: D

This question in 0971/21 May/June 2020

1 A mixture of ice and water is left to stand and the ice melts. Which row describes what happens as the ice is melting? temperature of mixture energy changes A increases average kinetic energy of particles increases B increases energy is used to overcome attractive forces C stays the same average kinetic energy of particles increases D stays the same energy is used to overcome attractive forces

1 marks

Answer: D

This question in 0971/22 May/June 2020

2 Which description of Brownian motion is correct? A random movement of particles due to bombardment by larger particles B random movement of particles due to bombardment by smaller particles C random movement of particles from a high concentration to a low concentration D random movement of particles from a low concentration to a high concentration

1 marks

Answer: B

This question in 0971/22 Oct/Nov 2022

12 Some properties of four fuels are shown. Which fuel is a gas at room temperature and makes two products when it burns in a plentiful supply of air? melting point boiling point fuel formula / C / C A hydrogen H2 –259 –253 B methane CH4 –182 –164 C octane C8H18 –57 126 D wax C31H64 60 400

1 marks

Answer: B

This question in 0971/22 Oct/Nov 2022

1. The diagram shows the result of dropping a purple crystal into water. after water five hours —__ > purple purple solution crystal Which processes take place in this experiment? chemical reaction diffusing dissolving 0 OO WwW PY x « & Ke O&K << & x

1 marks

Answer: D

This question in 0971/21 May/June 2023

1 Four physical changes of ethanol are listed. 1 condensation 2 evaporation 3 freezing 4 boiling In which changes do the particles move further apart? A 1 and 2 B 1 and 3 C 2 and 4 D 3 and 4

1 marks

Answer: C

This question in 0971/22 May/June 2023

1. Part of a cooling curve for water is shown. 100 temperature /°C time/min What is occurring between points X and Y? A Steam is condensing into water. B- The temperature of the water is decreasing. C Ice is melting. D Particles are losing heat to the surroundings.

1 marks

Answer: D

This question in 0971/22 Oct/Nov 2023

1 A gas is heated. The pressure is kept constant. Which statement describes the behaviour of the particles in the gas? A The particles move faster and become closer together. B The particles move faster and become further apart. C The particles move more slowly and become closer together. D The particles move more slowly and become further apart.

1 marks

Answer: B

This question in 0971/21 May/June 2024

2 A mixture of ice and water is left to stand and the ice melts. Which row describes what happens as the ice is melting? temperature of energy change mixture A increases average kinetic energy of particles decreases B increases energy is used to overcome attractive forces C stays the same average kinetic energy of particles decreases D stays the same energy is used to overcome attractive forces

1 marks

Answer: D

This question in 0971/21 May/June 2024

1 Oxygen melts at –219 C and boils at –183 C. At which temperature is oxygen a liquid? A –225 C B –189 C C –175 C D 25 C

1 marks

Answer: B

This question in 0971/22 Oct/Nov 2024

2 The pressure of a sample of gas is decreased. The temperature is kept constant. Which row describes the effects on the particles? movement collisions of particles between particles A slower occur less often B slower occur with more force C no change in speed occur less often D no change in speed occur with more force

1 marks

Answer: C

This question in 0971/22 Oct/Nov 2024

1 An ice cube melts. ice cube pool of water What happens to the molecules of water in the ice cube? A They evaporate. B They dissolve. C They gain energy. D They lose energy.

1 marks

Answer: C

This question in 0971/22 May/June 2025

2 A sample of a liquid, X, is heated to a temperature above its boiling point. X is then cooled, so that it condenses and then freezes. Which graph describes the change in temperature of X over time? A B temperature / °C temperature / °C time / s time / s C D temperature / °C temperature / °C time / s time / s

1 marks

Answer: D

This question in 0971/22 May/June 2025

23 Tennessine (atomic number 117) is a manufactured element that is below astatine in Group VII of the Periodic Table. What is the expected state of tennessine at room temperature and pressure? A a diatomic gas B a liquid C a monatomic gas D a solid

1 marks

Answer: D

This question in 0971/22 May/June 2025

40 Pure ethanol has a melting point of –114 °C and a boiling point of 78 °C. What are the melting and boiling points of a sample of ethanol with glucose dissolved in it? melting boiling point / °C point / °C A –116 77 B –116 79 C –112 77 D –112 79

1 marks

Answer: B

This question in 0971/22 May/June 2025

1 What happens to the volume of a fixed mass of gas when the temperature is increased or the pressure is decreased? increased temperature decreased pressure A volume decreased volume decreased B volume decreased volume increased C volume increased volume decreased D volume increased volume increased

1 marks

Answer: D

This question in 0971/22 Oct/Nov 2025

2 The diagram shows the heating curve for a substance. U S T temperature Q R P time Between which two points do the particles of the substance change from being in fixed positions to being mobile? A P and Q B Q and R C S and T D T and U

1 marks

Answer: B

This question in 0971/22 Oct/Nov 2025