Bonding: OCR GCSE Chemistry A questions

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

All 67 questions on Bonding, as a list

June 2025, Paper 1 Foundation, Q12 (1 mark): Barium carbonate contains the ions Ba2+ and CO3 2–. What is the formula for barium carbonate? A BaCO3 B Ba(CO3)2 C Ba2CO3 D Ba2(CO3)2 Your answer [1]
June 2025, Paper 1 Foundation, Q14 (1 mark): How many covalent bonds can a carbon atom form? A 2 B 4 C 6 D 8 Your answer [1]
June 2025, Paper 1 Foundation, Q20(c) (2 marks): Complete the sentence to explain how a lithium atom forms a lithium ion. Put a ring around each correct option. The lithium atom gains / loses / shares one elec
June 2025, Paper 1 Foundation, Q20(e) (2 marks): Lithium can bond with fluorine to form lithium fluoride, LiF. Complete the dot and cross diagram in Fig. 20.2 to show the bonding in lithium fluoride. Include t
June 2025, Paper 3 Higher, Q1 (1 mark): How many covalent bonds can a carbon atom form? A 2 B 4 C 6 D 8 Your answer [1]
June 2025, Paper 3 Higher, Q9 (1 mark): Which statement is true of all the diagrams of a water molecule? O O H H H H A Shows all the atoms B Shows all the electrons C Shows the bonds between the atoms
June 2025, Paper 3 Higher, Q10 (1 mark): Aluminium sulfate contains aluminium ions Al 3+ and sulfate ions SO4 2–. What is the formula for aluminium sulfate? A Al SO4 B Al(SO4)2 C Al 2SO4 D Al 2(SO4)3 Y
June 2025, Paper 3 Higher, Q19(b) (1 mark): Describe how a lithium atom forms a lithium ion. [1]
June 2025, Paper 3 Higher, Q19(d) (2 marks): Lithium can bond with fluorine to form lithium fluoride. Draw the dot and cross diagram to show the bonding in lithium fluoride. You only need to show the outer
June 2025, Paper 3 Higher, Q20 (6 marks): 20* This question is about structure and bonding. The table shows some information about three different substances. Melting Boiling Substance Conducts electric
June 2025, Paper 4 Higher, Q6 (1 mark): Which type of bond is found in butene? A Covalent B Electrostatic C Ionic D Metallic Your answer [1]
June 2024, Paper 1 Foundation, Q4 (1 mark): Sodium chloride, NaCl , is an ionic compound. How are the ions held together in sodium chloride? A Covalent bonds B Delocalised electrons C Electrostatic forces
June 2024, Paper 1 Foundation, Q9 (1 mark): Which dot and cross diagram shows the structure of a fluorine molecule, F2? A F B F F C + – F F D F F Your answer [1]
June 2024, Paper 1 Foundation, Q16(c) (2 marks): A water molecule can be represented with different models. O O H H H H Model 1 Model 2 Model 3 Which model would you use to show the volume of a water molecule?
June 2024, Paper 1 Foundation, Q18(b)(i) (1 mark): Explain what a covalent bond is in terms of electrons. [1]
June 2024, Paper 3 Higher, Q3 (1 mark): A lithium ion is Li+ and a phosphate ion is PO4 3 –. 3 What is the formula of lithium phosphate? A Li(PO4)3 B Li2PO4 C Li2(PO4)3 D Li3PO4 Your answer [1]
June 2024, Paper 3 Higher, Q19(b)(i) (2 marks): Complete the sentences about how atoms form ions. Atoms are to form positive ions. Atoms electrons to form positive ions. Atoms are to form negative ions. Atoms
June 2024, Paper 3 Higher, Q21(b)(ii) (2 marks): Construct the dot and cross diagram for the ions in magnesium chloride, MgCl 2. Show the outer electron shells only. Dot and cross diagram: [2]
June 2023, Paper 1 Foundation, Q2 (1 mark): Sodium fluoride has the formula NaF. The formula of the sodium ion is Na+. 2 What is the formula of the fluoride ion? F+ A F– B F2+ C F2– D Your answer [1]
June 2023, Paper 1 Foundation, Q6 (1 mark): An element gains electrons to form a full outer shell. Which part of the Periodic Table will the element be from? C D A B Your answer [1]
June 2023, Paper 1 Foundation, Q18(a) (3 marks): Draw three lines to connect each name to its correct model. Name Model H H C H H Ball and stick model H H C H H Dot and cross diagram 3D Space-filling model [3]
June 2023, Paper 1 Foundation, Q18(b) (2 marks): A student wants to use a model to show the location of the electrons in a water molecule as shown in Fig. 18.1. Fig. 18.1 O H H Model 1 Model 2 Explain why the
June 2023, Paper 1 Foundation, Q19(a) (6 marks): The table shows the type of bonding in three substances. Substance Type of bonding simple molecular Bromine, Br2 (covalent) Sodium chloride, NaCl ionic Diamond,
June 2023, Paper 3 Higher, Q5 (1 mark): The diagram shows a 3D space filling model of methane. What are the limitations of showing methane as a 3D space filling model? A It does not show how close tog
June 2023, Paper 3 Higher, Q8 (1 mark): Calcium phosphate contains the ions Ca2+ and PO4 3–. What is the formula for calcium phosphate? A CaPO4 B Ca2PO4 C Ca2(PO4)3 D Ca3(PO4)2 [1] Your answer
June 2023, Paper 3 Higher, Q18(c) (2 marks): Complete the dot and cross diagram to show the bonding in carbon dioxide, CO2. You only need to show the outer shell electrons. O C O [2]
June 2023, Paper 3 Higher, Q20(b) (2 marks): The salt collected is sodium chloride. Complete the ball and stick model by labelling the sodium ions and the chloride ions. [2]
June 2023, Paper 3 Higher, Q22(c)(i) (1 mark): Explain why magnesium forms Mg2+ ions. [1]
June 2022, Paper 1 Foundation, Q8 (1 mark): The symbol for a calcium ion is Ca2+. The symbol for an iodate ion is IO3 –. 8 What is the formula for calcium iodate? A CaIO3 B CaIO32 C Ca(IO3)2 D Ca2IO3 Your
June 2022, Paper 1 Foundation, Q16(c) (2 marks): Chlorine is in Group 7 of the Periodic Table. Chlorine is a non-metal. Why do non-metals form negative ions? [2]
June 2022, Paper 1 Foundation, Q16(d) (1 mark): Chlorine reacts with aluminium to form aluminium chloride. • The formula for aluminium chloride is Al Cl 3. The symbol for a chloride ion is Cl –. • What is the
June 2022, Paper 1 Foundation, Q18(b)(i) (3 marks): Describe the structure and bonding in a metal. You can include a labelled diagram in your answer. [3]
June 2022, Paper 1 Foundation, Q21(a) (2 marks): Which statements about this ball and stick model of ethene are correct? Tick (3) two boxes. The model shows how many electrons the carbon atoms have. The model
June 2022, Paper 1 Foundation, Q21(b) (2 marks): Molecules can be drawn using dot and cross diagrams. Br Br Complete the dot and cross diagram for bromine, Br2. Show the electrons in the outer shells only. [2]
June 2022, Paper 3 Higher, Q3 (1 mark): A Group 1 element reacts with a Group 7 element, so that both elements have a full outer shell of electrons. The table shows what happens to both elements durin
June 2022, Paper 3 Higher, Q14 (1 mark): Which statement about the bonding in magnesium oxide is correct? A There are strong covalent bonds between atoms. B There are strong covalent bonds between ions
June 2022, Paper 3 Higher, Q16(a) (2 marks): Which statements about this ball and stick model of ethene are correct? Tick (3) two boxes. The model shows how many electrons the carbon atoms have. The model
June 2022, Paper 3 Higher, Q16(b) (2 marks): Molecules can be drawn using dot and cross diagrams. Br Br Complete the dot and cross diagram for bromine, Br2. Show the electrons in the outer shells only. [2]
June 2022, Paper 3 Higher, Q22(b)(i) (2 marks): Construct a balanced ionic equation for the formation of zinc bromide. [2]
November 2021, Paper 1 Foundation, Q10 (1 mark): Which statement describes the bonding in iron? A Cross-links between the chains are strong. B Electrons are shared between atoms. C Electrons are transferred be
November 2021, Paper 1 Foundation, Q13 (1 mark): Which substance has covalent bonding? A Aluminium B Carbon dioxide C Magnesium D Sodium chloride Your answer [1]
November 2021, Paper 1 Foundation, Q21(a) (6 marks): Molecules can be shown using different diagrams or models. The table shows a diagram and a model of ammonia, NH3. 3-D space filling Molecule Dot and cross diagr
November 2021, Paper 1 Foundation, Q21(b) (2 marks): Dot and cross diagrams can also be used to show ionic compounds. Lithium fluoride, LiF, is an ionic compound. • The electronic structure of a lithium atom is 2.
November 2021, Paper 3 Higher, Q2 (1 mark): The formula of a sodium ion is Na+. The formula of a phosphate ion is PO4 3-. 2 What is the formula of sodium phosphate? A Na(PO4)3 B Na2PO4 C Na3PO4 D Na4PO4 Y
November 2021, Paper 3 Higher, Q3 (1 mark): Which statement describes ionic bonding? A Electrons are delocalised. B Electrons are shared between atoms. C Electrons are transferred from a metal to a non-me
November 2021, Paper 3 Higher, Q14 (1 mark): Which statement about covalent bonding is not correct? A Covalent bonds are broken when a compound changes state from a liquid to a gas. B Covalent bonds are st
November 2020, Paper 1 Foundation, Q14 (1 mark): The symbol of an aluminium ion is Al3+. The symbol of an oxide ion is O2−. What is the formula of aluminium oxide? A Al O B Al 2O C Al 3O2 D Al 2O3 Your answer
November 2020, Paper 1 Foundation, Q18(a)(iii) (1 mark): Molten lead bromide contains lead ions, Pb2+, and bromide ions, Br−. What is the formula for lead bromide? Tick (3) one box. PbBr PbBr2 Pb2Br Pb2Br2 [1]
November 2020, Paper 1 Foundation, Q22(a)(i) (2 marks): Identify the bonding in structure A. Explain your answer. Bonding Explanation [2]
November 2020, Paper 3 Higher, Q13 (1 mark): Which equation shows the formation of a Group 2 metal ion? M represents a Group 2 metal and e− represents an electron. M + e− M+ A M + 2e− M2+ B M+ + e− C M M2+
November 2020, Paper 3 Higher, Q16(a)(i) (2 marks): Identify the bonding in structure A. Explain your answer. Bonding Explanation [2]
November 2020, Paper 3 Higher, Q21(a) (2 marks): Draw a dot and cross diagram to show the ions in sodium oxide. [2]
June 2019, Paper 1 Foundation, Q7 (1 mark): Which substance has ionic bonding? A Carbon dioxide B Carbon monoxide C Magnesium oxide D Oxygen Your answer [1]
June 2019, Paper 1 Foundation, Q15 (1 mark): The formula of a magnesium ion is Mg2+. −. The formula of a nitrate ion is NO3 What is the formula of magnesium nitrate? A MgNO3 B Mg2NO3 C Mg(NO3)2 D Mg2(NO3)3
June 2019, Paper 1 Foundation, Q17(b) (6 marks): A new solid, compound X, has been discovered. Scientists investigated the effect of heat on compound X. Look at the graph. It shows how the state of compound X
June 2019, Paper 1 Foundation, Q20(d)(i) (2 marks): Carbon reacts with hydrogen to make methane, CH4. Complete the dot and cross diagram to show the bonding in methane. H C H H H
June 2019, Paper 1 Foundation, Q22(a)(i) (2 marks): Describe the structure and bonding in a metal. You may include a diagram in your answer. [2]
June 2019, Paper 3 Higher, Q16(a)(i) (2 marks): Describe the structure and bonding in a metal. You may include a diagram in your answer. [2]
June 2019, Paper 3 Higher, Q21(a)(i) (2 marks): A scientist thinks the ball-and-stick model should be used to model ionic compounds. Describe two limitations of using the ball-and-stick model for ionic compou
June 2019, Paper 3 Higher, Q21(a)(ii) (2 marks): Ionic compounds can also be modelled using a dot-and-cross diagram. Draw a dot and cross diagram to show the ions in sodium chloride. [2]
June 2018, Paper 1 Foundation, Q6 (1 mark): –. Lead nitrate contains lead ions, Pb2+, and nitrate ions, NO3 6 What is the formula for lead nitrate? A PbNO3 B Pb(NO3)2 C Pb2NO3 D Pb2(NO3)2 Your answer [1]
June 2018, Paper 1 Foundation, Q9 (1 mark): Which statement about covalent bonding is true? A Electrons are transferred from one atom to another. B Electrons are delocalised. C Electrons are shared betwee
June 2018, Paper 1 Foundation, Q24 (6 marks): 24* Look at the data about some substances. Melting point Boiling point Does it conduct Density Substance (g/cm3) (°C) (°C) Electricity? A 0 100 No 1.0 B 1085 2
June 2018, Paper 3 Higher, Q6 (1 mark): Which statement about covalent bonding is true? A Electrons are transferred from one atom to another. B Electrons are delocalised. C Electrons are shared betwee
June 2018, Paper 3 Higher, Q19(d)(i) (3 marks): The electronic structure of sodium is 2.8.1. The electronic structure of oxygen is 2.6. Sodium and oxygen react together to make sodium oxide. Sodium oxide is a
June 2018, Paper 3 Higher, Q19(d)(ii) (1 mark): What is the formula of sodium oxide? [1]
June 2018, Paper 3 Higher, Q25 (6 marks): 25* Look at the data about some substances. Melting point Boiling point Does it conduct Density Substance (g / cm3) (°C) (°C) electricity? A 0 100 no 1.0 B >300

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