plumiCovalent and dative covalent bonding: OCR A‑Level Chemistry A questions
OCR A-Level Chemistry A past-paper questions on 2.2.2.2 Covalent and dative covalent bonding, 2016–2025, with mark schemes and examiner’s reports where available.
All papers
All years
Q5(b)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ5(a)(i)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFLoading the question…
Open the full PDFYour answerQ4(c)(iv)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ23(c)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ1(c)(ii)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ6(b)(ii)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ21(a)(i)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ21(a)(ii)
The whole paper ↗Loading the start of the question…
Loading the question…
Open the full PDFQ1(b)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ5(c)(ii)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ21(d)(iv)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ19(c)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ21(b)(i)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ16(a)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ21(c)(ii)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDF
All 16 questions on Covalent and dative covalent bonding, 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 2025, AS Paper 2, Q5(a)(i) (1 mark): Draw a ‘dot-and-cross’ diagram for CH3Cl . Show outer electrons only. Use a different symbol for the electrons of each element. [1]
- June 2024, Paper 2, Q1 (1 mark): All organic compounds have covalent bonds. What is the electrostatic attraction in a covalent bond between? A A shared pair of electrons and the nuclei of the b
- June 2024, Paper 3, Q4(c)(iv) (2 marks): In a molecule of P3N3Cl 6 all the N and Cl atoms are bonded to P atoms. Suggest a possible structure for a molecule of P3N3Cl 6. [2]
- June 2024, AS Paper 1, Q23(c) (2 marks): Hydrogen cyanide, HCN, is bonded by a single bond between the H and C atoms and a triple bond between the C and N atoms. Draw a ‘dot‑and‑cross’ diagram for a mo
- June 2024, AS Paper 2, Q1(c)(ii) (2 marks): When ammonia dissolves in water, ammonium ions, NH4 + ion. Draw a ‘dot-and-cross’ diagram to show the bonding in an NH4 Show outer electrons only. [2]
- June 2023, Paper 3, Q6(b)(ii) (2 marks): The solution contains nitrate ions, NO3 – ion. Draw a ‘dot-and-cross’ diagram for the NO3 Use a different symbol for the extra electron. [2]
- June 2023, AS Paper 1, Q21(a)(i) (1 mark): What is meant by a covalent bond? [1]
- June 2023, AS Paper 1, Q21(a)(ii) (2 marks): Draw ‘dot-and-cross’ diagrams for NF3 and BF3. Show outer electrons only. NF3 BF3 [2]
- November 2021, AS Paper 2, Q1(b) (2 marks): Sulfur difluoride, SF2, shows covalent bonding. Draw a ‘dot-and-cross’ diagram to show the bonding in SF2. Show outer electrons only. [2]
- June 2019, Paper 3, Q5(c)(ii) (1 mark): In some of its reactions, the thiosulfate ion forms the tetrathionate ion, S4O6 2− ion is a ‘dimer’ of S2O3 2−. The S4O6 2− ion. Draw a displayed formula for th
- June 2019, AS Paper 1, Q21(d)(iv) (2 marks): Nitrogen forms an oxide with the formula N2O. A molecule of N2O is linear and has a nitrogen atom in the centre. Draw a ‘dot-and-cross’ diagram for an N2O molec
- June 2018, Paper 1, Q19(c) (2 marks): Sodium carbonate, Na2CO3, is a base used in washing soda. 2–, shown below. Na2CO3 contains the carbonate ion, CO3 O– C O– O Draw the ‘dot-and-cross’ diagram for
- June 2018, AS Paper 1, Q21(b)(i) (1 mark): Draw a ‘dot-and-cross’ diagram of a phosgene molecule. Show outer electrons only. [1]
- June 2017, Paper 1, Q16(a) (1 mark): Lithium aluminium hydride, LiAl H4, contains the Al H4 – ion. Draw a ‘dot-and-cross’ diagram to show the bonding in an Al H4 Show outer electrons only. [1]
- June 2016, AS Paper 1, Q21(c)(ii) (2 marks): Ni(NO3)2 contains the NO3 single covalent bond, a double covalent bond and a dative covalent bond, as shown below. O– N O O – ion, showing outer shell electrons
Questions, mark schemes and examiner’s reports are © OCR, from their published past papers. Plumi isn’t affiliated with any exam board. Want whole papers? OCR A-Level Chemistry A past papers, or our free OCR-style practice pack.
The Plumi iPad app also offers exam-style questions with AI feedback on your handwritten working.