Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Principles of Chemistry
991 practice questions
Topics covered
- States of Matter102 practice questions
- Elements, Compounds and Mixtures69 practice questions
- Atomic Structure108 practice questions
- The Periodic Table103 practice questions
- Chemical Formulae, Equations and Calculations Part 119 practice questions
- Chemical Formulae, Equations and Calculations Part 2144 practice questions
- Ionic Bonding143 practice questions
- Covalent Bonding68 practice questions
- Metallic Bonding19 practice questions
- Electrolysis198 practice questions
Practice questions
1–10 of 407 · Easy
Question 1
1 mark · Easy
Answer and see the solution →State the arrangement of particles in a solid.
Question 2
3 marks · Easy
Answer and see the solution →The diagram below shows three beakers, each containing a different substance at room temperature.
Each beaker represents a state of matter. (a)[1 mark]State which beaker would represent water vapour. Give a reason for your answer.
(b)[1 mark]Describe the arrangement of the particles in the beaker containing a liquid.
(c)[1 mark]Explain why solids keep their shape, using the particle model.
Question 3
2 marks · Easy
Answer and see the solution →Explain why a gas can be compressed easily, but a solid cannot, using the particle model.
Question 4
3 marks · Easy
Answer and see the solution →Physical properties of three substances at room temperature Substance Volume (cm³) Can flow? Keeps shape? X 100 No Yes Y 100 Yes Takes container shape Z 200 Yes No (a)[1 mark]Which substance is most likely a solid? Give a reason for your answer.
(b)[2 marks]Describe the arrangement and movement of the particles in substance Z.
Question 5
1 mark · Easy
Answer and see the solution →State the movement of particles in a liquid.
Question 6
3 marks · Easy
Answer and see the solution →Describe the arrangement and movement of particles in each of the three states of matter.
(a)[1 mark]Solid
(b)[1 mark]Liquid
(c)[1 mark]Gas
Question 7
2 marks · Easy
Answer and see the solution →A single cube of a solid is made up of 1000 closely packed particles. When it melts to become a liquid, the particles move slightly further apart so that the same number of particles now fills 1050 units of volume.
Calculate the percentage increase in the volume occupied by the particles after melting.
Give your answer to 2 significant figures.
Question 8
2 marks · Easy
Answer and see the solution →A cylinder of gas contains 0.012 moles of gas molecules that are free to move in a space of 300 cm^3. If these same particles were packed into a solid state, they would occupy only 50 cm^3.
Calculate how many times greater the volume occupied by the particles is in the gas state compared to the solid state.
Show your working.
Question 9
1 mark · Easy
Answer and see the solution →State what happens to the movement of particles when a solid is heated until it becomes a liquid.
Question 10
3 marks · Easy
Answer and see the solution →A block of ice is left at room temperature. It changes from a solid to a liquid and then to a gas.
(a)[1 mark]Name the process when ice changes from solid to liquid.
(b)[1 mark]Name the process when water changes from liquid to gas.
(c)[1 mark]Describe what happens to the movement of particles during melting and boiling.