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Bonding: OCR GCSE Combined Science A questions

Every OCR GCSE Combined Science A exam question on C2.2 Bonding, 2018–2025, with its mark scheme and examiner’s report.

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3,411 questions

  1. Q13(a)(i)

    June 2025 · Chemistry Paper 3 Foundation

    1 markC2.2 Bonding
    The whole paper ↗

  2. Q13(a)(ii)

    June 2025 · Chemistry Paper 3 Foundation

    1 markC2.2 Bonding
    The whole paper ↗

  3. Q13(e)

    June 2025 · Chemistry Paper 3 Foundation

    6 marksC2.2 Bonding
    The whole paper ↗

  4. Q14(f)

    June 2025 · Chemistry Paper 3 Foundation

    2 marksC2.2 Bonding
    The whole paper ↗

  5. Q14(g)

    June 2025 · Chemistry Paper 3 Foundation

    2 marksC2.2 Bonding
    The whole paper ↗

  6. Q6

    June 2025 · Chemistry Paper 9 Higher

    1 markC2.2 Bonding
    The whole paper ↗
    Your answer

  7. Q14(b)(i)

    June 2025 · Chemistry Paper 9 Higher

    2 marksC2.2 Bonding
    The whole paper ↗

  8. Q15(b)

    June 2025 · Chemistry Paper 9 Higher

    3 marksC2.2 Bonding
    The whole paper ↗

  9. Q15

    June 2024 · Chemistry Paper 3 Foundation

    6 marksC2.2 BondingC2.3 Properties of materials
    The whole paper ↗

  10. Q17(d)

    June 2024 · Chemistry Paper 3 Foundation

    2 marksC2.2 Bonding
    The whole paper ↗

  11. Q5

    June 2024 · Chemistry Paper 9 Higher

    1 markC2.2 Bonding
    The whole paper ↗
    Your answer

  12. Q6

    June 2024 · Chemistry Paper 9 Higher

    1 markC2.2 Bonding
    The whole paper ↗
    Your answer

  13. Q11(d)

    June 2024 · Chemistry Paper 9 Higher

    2 marksC2.2 Bonding
    The whole paper ↗

  14. Q5

    June 2023 · Chemistry Paper 3 Foundation

    1 markC2.2 Bonding
    The whole paper ↗
    Your answer

  15. Q8

    June 2023 · Chemistry Paper 3 Foundation

    1 markC2.2 Bonding
    The whole paper ↗
    Your answer

  16. Q11(c)(i)

    June 2023 · Chemistry Paper 3 Foundation

    1 markC2.2 Bonding
    The whole paper ↗

  17. Q11(c)(ii)

    June 2023 · Chemistry Paper 3 Foundation

    2 marksC2.2 Bonding
    The whole paper ↗

  18. Q15(e)(i)

    June 2023 · Chemistry Paper 3 Foundation

    2 marksC2.2 Bonding
    The whole paper ↗

  19. Q15(e)(ii)

    June 2023 · Chemistry Paper 3 Foundation

    1 markC2.2 Bonding
    The whole paper ↗

  20. Q11(e)(i)

    June 2023 · Chemistry Paper 9 Higher

    2 marksC2.2 Bonding
    The whole paper ↗
All 61 questions on Bonding, as a list
  1. June 2025, Chemistry Paper 3 Foundation, Q13(a)(i) (1 mark): Fig. 13.1 shows a model for the ionic lattice of sodium chloride. Complete Fig. 13.1 by writing in the missing sodium ions, Na+, and chloride ions, Cl –. [1] Fi
  2. June 2025, Chemistry Paper 3 Foundation, Q13(a)(ii) (1 mark): What is the formula of sodium chloride? [1]
  3. June 2025, Chemistry Paper 3 Foundation, Q13(e) (6 marks): Sodium chloride is an ionic compound. (e)* Fig. 13.3 shows the dot and cross diagram for sodium chloride. Fig. 13.3 + − Na Cl Na Cl Sodium atom Chlorine atom So
  4. June 2025, Chemistry Paper 3 Foundation, Q14(f) (2 marks): Fig. 14.1 shows the ball and stick model for a molecule of ammonia. Fig. 14.1 Which statements about a ball and stick model are true, and which are false? Tick
  5. June 2025, Chemistry Paper 3 Foundation, Q14(g) (2 marks): Fig. 14.2 shows the structure of a molecule of ammonia. Fig. 14.2 H N H H Complete the dot and cross diagram for a molecule of ammonia. Only show the outer shel
  6. June 2025, Chemistry Paper 9 Higher, Q6 (1 mark): Which of these is a cation? Cl– A B He C I2 Na+ D Your answer [1]
  7. June 2025, Chemistry Paper 9 Higher, Q14(b)(i) (2 marks): Complete the dot and cross diagram for a molecule of ethene. Only show the outer shell electrons. H H C C H H [2]
  8. June 2025, Chemistry Paper 9 Higher, Q15(b) (3 marks): Explain why the formula of sodium hydroxide is NaOH but the formula of calcium hydroxide is Ca(OH)2. [3]
  9. June 2024, Chemistry Paper 3 Foundation, Q15 (6 marks): 15* This question is about the ionic compound sodium chloride, NaCl. It is made from sodium ions, Na+, and chloride ions, Cl – ions. The diagram shows the struc
  10. June 2024, Chemistry Paper 3 Foundation, Q17(d) (2 marks): When an atom of lithium reacts with oxygen it forms a lithium ion, Li+. Describe how an atom of lithium forms a lithium ion. [2]
  11. June 2024, Chemistry Paper 9 Higher, Q5 (1 mark): In which molecule is X an atom of carbon? X A X F B F F F F C D F X F X F F F Your answer [1]
  12. June 2024, Chemistry Paper 9 Higher, Q6 (1 mark): Boron, B, is in Group 3 of the Periodic Table and chlorine, Cl, is in Group 7 of the Periodic Table. What is the formula of the compound formed when boron react
  13. June 2024, Chemistry Paper 9 Higher, Q11(d) (2 marks): When an atom of lithium reacts with oxygen it forms a lithium ion, Li+. Describe how an atom of lithium forms a lithium ion. [2]
  14. June 2023, Chemistry Paper 3 Foundation, Q5 (1 mark): Which element forms compounds with covalent molecules consisting of chains and rings? A Argon B Carbon C Hydrogen D Oxygen Your answer [1]
  15. June 2023, Chemistry Paper 3 Foundation, Q8 (1 mark): Sodium sulfite contains Na+ ions and SO3 2– ions. 8 What is the formula of sodium sulfite? A NaSO3 B Na(SO3)2 C Na2SO3 D Na2(SO3)2 Your answer [1]
  16. June 2023, Chemistry Paper 3 Foundation, Q11(c)(i) (1 mark): Complete Fig. 11.2 by drawing in the missing outer electrons. [1]
  17. June 2023, Chemistry Paper 3 Foundation, Q11(c)(ii) (2 marks): Complete the sentences about the bonding in a particle of chlorine. Put a ring around each correct option. The particles of chlorine are called isotopes / molec
  18. June 2023, Chemistry Paper 3 Foundation, Q15(e)(i) (2 marks): Complete Fig. 15.2 to show the arrangement of electrons in the ions. [2]
  19. June 2023, Chemistry Paper 3 Foundation, Q15(e)(ii) (1 mark): What is the formula of the ionic compound formed when atoms of sodium react with atoms of Y? Tick (3) one box. NaY2 Na2Y Na2Y2 [1]
  20. June 2023, Chemistry Paper 9 Higher, Q11(e)(i) (2 marks): Complete Fig. 11.2 to show the arrangement of electrons in the ions. [2]
  21. June 2023, Chemistry Paper 9 Higher, Q11(e)(ii) (1 mark): What is the formula of the ionic compound formed when atoms of sodium react with atoms of Y? Tick (3) one box. NaY2 Na2Y Na2Y2 [1]
  22. June 2022, Chemistry Paper 3 Foundation, Q11(e) (2 marks): Nitrogen dioxide is made from the reaction of nitrogen with oxygen. Fig. 11.2 shows the bonding in a molecule of oxygen, O2. Fig. 11.2 O O Fig. 11.3 shows an in
  23. June 2022, Chemistry Paper 3 Foundation, Q12(e) (2 marks): Aluminium forms an Al 3+ ion and chlorine forms a Cl – ion. Three students write down the formula of aluminium chloride. Student A: Al Cl Student B: Al Cl 3 Stu
  24. June 2022, Chemistry Paper 3 Foundation, Q15(b)(i) (2 marks): Explain how two atoms of carbon form a covalent bond. [2]
  25. June 2022, Chemistry Paper 3 Foundation, Q15(b)(ii) (1 mark): How many covalent bonds does one atom of carbon form in a molecule of fullerene, as shown in Fig. 15.1? [1]
  26. June 2022, Chemistry Paper 9 Higher, Q12(b) (2 marks): Explain how an atom of potassium reacts with an atom of chlorine to make potassium chloride. [2]
  27. June 2022, Chemistry Paper 9 Higher, Q14(b) (4 marks): Calcium is a metal which can conduct electricity. Describe the structure and bonding in a metal and explain why metals can conduct electricity. You can include
  28. November 2021, Chemistry Paper 3 Foundation, Q9 (1 mark): An atom of an element forms an ion with the formula X2–. 9 Which Group of the Periodic Table is the element found in? A Group 0 B Group 2 C Group 6 D Group 7 Yo
  29. November 2021, Chemistry Paper 3 Foundation, Q10 (1 mark): The diagram shows the ‘ball and stick’ model for an ionic compound. Which statement about the ‘ball and stick’ model is correct? A It shows all the forces betwe
  30. November 2021, Chemistry Paper 3 Foundation, Q15(b) (2 marks): Look at Fig. 15.2. It shows a sodium atom, Na, and a sodium ion, Na+. + Sodium atom Sodium ion Fig. 15.2 Explain how a sodium ion, Na+, is formed from a sodium
  31. November 2021, Chemistry Paper 3 Foundation, Q17(e) (1 mark): Citric acid and sodium hydrogen carbonate react to form sodium citrate. Sodium citrate contains sodium ions, Na+, and citrate ions, C6H5O7 3–. Write the formula
  32. November 2021, Chemistry Paper 9 Higher, Q1 (1 mark): An atom of an element forms an ion with the formula X2–. 1 Which Group of the Periodic Table is this element found in? A Group 0 B Group 2 C Group 6 D Group 7 Y
  33. November 2021, Chemistry Paper 9 Higher, Q2 (1 mark): The diagram shows the ‘ball and stick’ model for an ionic compound. Which statement about the ‘ball and stick’ model is correct? A It shows all the forces betwe
  34. November 2021, Chemistry Paper 9 Higher, Q11(e) (1 mark): Citric acid and sodium hydrogen carbonate react to form sodium citrate. Sodium citrate contains sodium ions, Na+, and citrate ions, C6H5O7 3–. Write the formula
  35. November 2021, Chemistry Paper 9 Higher, Q15(a) (2 marks): Explain what is meant by a covalent bond. [2]
  36. November 2021, Chemistry Paper 9 Higher, Q15(b) (2 marks): Look at the diagram. It shows the structure of carbon dioxide. O C O Complete the dot and cross diagram for carbon dioxide. O C O [2]
  37. November 2020, Chemistry Paper 3 Foundation, Q8 (1 mark): The bonding in a water molecule, H,O, can be shown by a dot and cross diagram. 8 A H I H H C H H H H Which is the correct dot and cross diagram for water? Your
  38. November 2020, Chemistry Paper 3 Foundation, Q11(c)(ii) (2 marks): Explain how an atom of magnesium reacts to form a magnesium ion. Use Fig. 11.1 to help you. [2]
  39. November 2020, Chemistry Paper 3 Foundation, Q17(a) (1 mark): Magnesium hydroxide contains magnesium ions, Mg2t, and hydroxide ions, OHF. Write the formula of magnesium hydroxide. [1]
  40. November 2020, Chemistry Paper 9 Higher, Q4 (1 mark): Which statement describes a covalent bond? A A shared pair of electrons. B The electrostatic attraction between oppositely charged ions. C The electrostatic att
  41. November 2020, Chemistry Paper 9 Higher, Q9 (1 mark): Which ionic equation is balanced correctly? 2Ag+ + CO3 2– A Ag2CO3 Al 3+ + 3OH– B AlOH3 Ba2+ + SO4 2– C Ba2(SO4)2 2Pb2+ + NO3 – D Pb2NO3 Your answer [1]
  42. November 2020, Chemistry Paper 9 Higher, Q12(a) (1 mark): Magnesium hydroxide contains magnesium ions, Mg2+, and hydroxide ions, OH–. Write the formula of magnesium hydroxide. [1]
  43. November 2020, Chemistry Paper 10 Higher, Q14(b)(i) (2 marks): Describe the metallic bonding in sodium. Use information from Fig. 14.2 in your answer. [2]
  44. November 2020, Chemistry Paper 10 Higher, Q14(b)(ii) (1 mark): Look at the melting points of sodium and lithium in Table 14.1. Suggest a reason for the difference in their melting points. [1]
  45. June 2019, Chemistry Paper 3 Foundation, Q16(d)(ii) (3 marks): Pure iron metal is produced in the reaction. Draw a diagram to show the bonding in a metal. Label your diagram clearly. [3]
  46. June 2019, Chemistry Paper 4 Foundation, Q11(c)(ii) (1 mark): What is the name of the chemical KBr? Tick (3) one box. Bromine Potassium Potassium bromide Potassium bromine [1]
  47. June 2019, Chemistry Paper 9 Higher, Q7 (1 mark): Magnesium ions react with chloride ions to form magnesium chloride. What is the correct ionic equation for this reaction? Mg+ + Cl– A MgCl Mg2+ + Cl2– B MgCl Mg
  48. June 2019, Chemistry Paper 9 Higher, Q9 (1 mark): Which diagram correctly shows the bonding in a molecule of hydrogen fluoride? + – H F A H F B H F C H F D Your answer [1]
  49. June 2019, Chemistry Paper 9 Higher, Q11(d)(ii) (3 marks): Pure iron metal is produced in the reaction. Draw a diagram to show the bonding in a metal. Label your diagram clearly. [3]
  50. June 2019, Chemistry Paper 9 Higher, Q15(a) (2 marks): Carbon is an element which can form a very wide range of compounds. This is partly due to the number of bonds that a carbon atom can form. State the type and ma
  51. June 2018, Chemistry Paper 3 Foundation, Q5 (1 mark): What is the chemical formula for sodium chloride? A Na2Cl B NaCl C NaCl2 D Na2Cl3 Your answer [1]
  52. June 2018, Chemistry Paper 3 Foundation, Q14(c) (2 marks): The displayed formula for the molecule does not show the exact length of the bonds. H O H C C O H H Write down two other limitations of the displayed formula. [
  53. June 2018, Chemistry Paper 3 Foundation, Q15(b) (2 marks): Phosphorus bonds with hydrogen to form the toxic gas phosphine, PH3. Draw a ‘dot and cross’ diagram to show the covalent bonding in PH3. [2]
  54. June 2018, Chemistry Paper 3 Foundation, Q19(a) (1 mark): Write the formula for aluminium oxide. [1]
  55. June 2018, Chemistry Paper 3 Foundation, Q19(b) (1 mark): A teacher wrote the formula for magnesium nitrate as: MgNO3 A student says that the formula is incorrect. Who is right? Explain your answer. [1]
  56. June 2018, Chemistry Paper 9 Higher, Q4 (1 mark): Atoms can form ions. Which statement is correct? A All metal ions are negatively charged. B Ions are always smaller than the atom they are made from. C Negative
  57. June 2018, Chemistry Paper 9 Higher, Q12(a) (1 mark): Write the formula for aluminium oxide. [1]
  58. June 2018, Chemistry Paper 9 Higher, Q12(b) (1 mark): A teacher wrote the formula for magnesium nitrate as: MgNO3 A student says that the formula is incorrect. Who is right? Explain your answer. [1]
  59. June 2018, Chemistry Paper 9 Higher, Q16(b) (2 marks): Look at the displayed formula of carbon dioxide. O = C = O The bonds between the carbon atom and the oxygen atoms are covalent bonds. Draw a ‘dot and cross’ dia
  60. June 2018, Chemistry Paper 9 Higher, Q16(c) (2 marks): Some elements bond to form compounds by ionic bonding. Describe what is meant by ionic bonding. [2]
  61. June 2018, Chemistry Paper 9 Higher, Q19 (4 marks): Methane, CH4, is the simplest alkane. The diagrams below are three ways to show the structure of methane. H H H C H C H H H H A B C Write about the advantages a

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