plumiIonic bonding and ionic lattices: OCR A‑Level Chemistry A questions
OCR A-Level Chemistry A past-paper questions on 2.2.2.1 Ionic bonding and ionic lattices, 2016–2025, with mark schemes and examiner’s reports where available.
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Q5(b)
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All 23 questions on Ionic bonding and ionic lattices, as a list
- June 2025, Paper 3, Q5(b) (2 marks): NaBH4 contains Na+ and BH4 – ions. Draw a ‘dot‑and‑cross’ diagram for NaBH4. Use a different symbol for the electrons from each element. Show outer electrons on
- June 2023, AS Paper 2, Q1(b)(iii) (2 marks): Reaction 1.2 produces a mixture of titanium and sodium chloride. Suggest how titanium could be separated from this mixture at room temperature. Explain your ans
- June 2023, AS Paper 2, Q2(c)(i) (4 marks): Complete the table above to show the type of lattice structure of each substance. [4]
- June 2023, AS Paper 2, Q2(c)(ii) (4 marks): Explain the following: • MgS has a higher melting point than PCl 3. • Al has a greater electrical conductivity than Si. Melting points Conductivities [4]
- June 2022, Paper 3, Q1(a)(i) (2 marks): The boiling point of NH3 is –33 °C. The boiling point of NH4NO3 is 210 °C. Explain why there is a large difference in boiling points. [2]
- June 2022, AS Paper 1, Q23(a)(i) (1 mark): What is meant by ionic bonding? [1]
- June 2022, AS Paper 1, Q23(a)(ii) (2 marks): Magnesium reacts with sulfur to form a compound which has a giant ionic lattice structure. The diagram shows ions as circles in part of the lattice. Complete th
- November 2021, AS Paper 1, Q1 (1 mark): Which compound has the highest boiling point? A ethanol B heptane C sodium chloride D water Your answer [1]
- November 2021, AS Paper 2, Q1(a)(i) (1 mark): Explain what is meant by ionic bonding. [1]
- November 2021, AS Paper 2, Q1(a)(ii) (2 marks): Draw a ‘dot-and-cross’ diagram to show the bonding in K2S. Show outer electrons only. [2]
- November 2021, AS Paper 2, Q1(c) (3 marks): At room temperature, K2S is a solid, but SF2 is a gas. Use ideas about structure and bonding to explain this difference. [3]
- November 2020, Paper 1, Q16(b)(i) (2 marks): Draw a ‘dot-and-cross’ diagram for MgBr2. Show outer electron shells only. [2]
- November 2020, Paper 1, Q16(c) (6 marks): This question is about magnesium, bromine and magnesium bromide. (c)* Table 16.1 shows some physical properties of magnesium, bromine and magnesium bromide. Ele
- November 2020, AS Paper 1, Q22(b) (2 marks): A compound of bromine is a solid at room temperature. The electrical conductivity of the compound at different physical states is shown in the table. Physical s
- November 2020, AS Paper 2, Q3(b)(i) (2 marks): Draw a ‘dot-and-cross’ diagram to show the bonding in CaBr2. Show outer electrons only. [2]
- June 2019, AS Paper 1, Q21(d)(i) (2 marks): Construct a ‘dot-and-cross’ diagram for Ca3N2. Show outer electrons only and the charges on each ion. [2]
- June 2019, AS Paper 1, Q21(d)(iii) (2 marks): Calcium reacts with oxygen to form a compound which has a giant ionic lattice structure. The diagram shows ions as circles in part of the lattice. Complete the
- June 2018, Paper 3, Q1(b) (5 marks): Table 1.1 shows some properties of Period 3 chlorides. Group 1 2 14 (4) 15 (5) 16 (6) Chloride NaCl MgCl2 SiCl4 PCl3 SCl2 Solid poor poor poor poor poor Electri
- June 2018, AS Paper 2, Q2(a) (2 marks): Draw a ‘dot-and-cross’ diagram to show the bonding in sodium sulfide. Show outer electrons only. [2]
- June 2018, AS Paper 2, Q2(b) (3 marks): The table below compares the properties of sodium sulfide, sodium and sulfur. Complete the table. Sodium sulfide Sodium Sulfur Melting point / °C 1180 98 113 Ty
- June 2017, AS Paper 2, Q1(a)(i) (1 mark): State what is meant by the term ionic bond. [1]
- June 2017, AS Paper 2, Q1(a)(ii) (2 marks): Draw a ‘dot-and-cross’ diagram to show the bonding in barium oxide. Show outer electrons only. [2]
- June 2017, AS Paper 2, Q1(b)(i) (2 marks): Compare the electrical conductivities of solid and aqueous barium chloride. Explain your answer in terms of the particles involved. [2]
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