plumiBonding: Edexcel A‑Level Chemistry questions
Every Edexcel A-Level Chemistry exam question on 2A Bonding, 2016–2025, with its mark scheme and examiner’s report.
Find questions2,028
Calculations
Q2(e)
The whole paper ↗
Q2(f)
The whole paper ↗
Q2(a)
The whole paper ↗
Q2(b)
The whole paper ↗
Q2(c)
The whole paper ↗
Q2(d)
The whole paper ↗
Q4(b)
The whole paper ↗
Q8(f)
The whole paper ↗
Q2(d)(iii)
The whole paper ↗
Q1(a)
The whole paper ↗
Q1(b)
The whole paper ↗
Q1(c)
The whole paper ↗
Q1(d)
The whole paper ↗
Q2(a)(ii)
The whole paper ↗
Q2(b)(iii)
The whole paper ↗
Q2(b)(iv)
The whole paper ↗
Q3(a)
The whole paper ↗
Q3(b)
The whole paper ↗
Q7(c)
The whole paper ↗
Q4(c)(i)
The whole paper ↗
All 142 questions on Bonding, as a list
- June 2025, Paper 1, Q2(e) (1 mark): Which of these isoelectronic ions has the largest ionic radius? (1) A S2– B Cl– C K+ D Ca2+
- June 2025, Paper 1, Q2(f) (6 marks): Discuss the reasons for the differences between the boiling temperatures of the compounds in the table. Refer to intermolecular forces in your answer. Detailed
- June 2025, Paper 2, Q2(a) (1 mark): Which of these isomers, with the formula C8H18, will have the lowest boiling temperature? (1) A (CH3)2CHCH2C(CH3)3 B (CH3)2CHCH2CH(CH3)CH2CH3 C CH3CH2CH2C(CH3)2
- June 2025, Paper 2, Q2(b) (2 marks): Pentan‑1‑ol and hexane have the same number of electrons but pentan‑1‑ol is much less volatile than hexane. Explain this difference in volatility. (2)
- June 2025, Paper 2, Q2(c) (1 mark): Iodine is a solid at room temperature but on gentle heating it vaporises. What bonds or forces are being broken? (1) A covalent bonds B ionic bonds C London for
- June 2025, Paper 2, Q2(d) (4 marks): The boiling temperature of boron trichloride is 13 °C while that of phosphorus trichloride is 76 °C. Explain, in terms of the shapes of the molecules, why phosp
- June 2025, Paper 2, Q4(b) (2 marks): Water molecules can undergo either heterolytic fission to form a hydroxide ion or homolytic fission to form a hydroxyl radical. Draw dot‑and‑cross diagrams of t
- June 2025, Paper 2, Q8(f) (3 marks): Anethole is also present in some alcoholic drinks such as the Greek liquor, ouzo. The anethole is responsible for the so‑called ‘ouzo effect’. This effect is th
- June 2025, Paper 3, Q2(d)(iii) (3 marks): Explain the expected solubilities in water of bombykol and prop-2-en-1-ol. (3)
- June 2025, AS Paper 1, Q1(a) (1 mark): The definition of electronegativity is the ability of an atom to attract (1) A a single bonding electron from a covalent bond B a pair of electrons from a coval
- June 2025, AS Paper 1, Q1(b) (2 marks): Draw a dot-and-cross diagram of silicon tetrachloride, showing outer shells of electrons only. Use crosses (×) for silicon electrons and dots (• ) for chlorine
- June 2025, AS Paper 1, Q1(c) (3 marks): Explain, using electronegativity values, why both chlorine and silicon tetrachloride are non-polar molecules. (3)
- June 2025, AS Paper 1, Q1(d) (2 marks): Explain why the boiling temperature of chlorine (−34 °C) is lower than that of silicon tetrachloride (57 °C). (2)
- June 2025, AS Paper 1, Q2(a)(ii) (2 marks): Describe what holds the ions together in sodium metal and in sodium chloride. (2) Sodium metal Sodium chloride
- June 2025, AS Paper 1, Q2(b)(iii) (2 marks): H → Al represents one of the bonds in AlH4 – . State the name of this type of bond and how the bond forms in this ion. (2)
- June 2025, AS Paper 1, Q2(b)(iv) (1 mark): What are the shapes of the aluminium chloride molecule and the tetrahydridoaluminate(III) ion? (1) – Name of shape of AlCl3 Diagram of shape of AlH4 – H H A tri
- June 2025, AS Paper 1, Q3(a) (1 mark): What are the intermolecular forces between water molecules? (1) A hydrogen bonds only B London forces and permanent dipoles only C London forces, permanent dipo
- June 2025, AS Paper 1, Q3(b) (1 mark): Ethanol, CH3CH2OH, is soluble in water but ethanethiol, CH3CH2SH, is almost insoluble. The best explanation for the difference in solubility is that (1) A ethan
- June 2025, AS Paper 1, Q7(c) (1 mark): Which isoelectronic ion has the smallest ionic radius? (1) A F– B Mg2+ C Na+ D O2–
- June 2025, AS Paper 2, Q4(c)(i) (2 marks): As the number of carbon atoms increases in the homologous series of unbranched primary alcohols, the state at room temperature changes from liquid to solid. Exp
- June 2025, AS Paper 2, Q4(c)(ii) (2 marks): The boiling temperatures of three isomeric alcohols are shown. Alcohol Boiling temperature / K pentan‑1‑ol 411 2‑methylbutan‑1‑ol 401 2,2‑dimethylpropan‑1‑ol 38
- June 2024, Paper 1, Q2(b) (1 mark): Which of these isoelectronic ions has the smallest ionic radius? (1) A S2− B Cl− C K+ D Ca2+
- June 2024, Paper 1, Q8(a) (2 marks): Draw dot-and-cross diagrams of the ions in magnesium hydroxide, showing the outer shell electrons only. Use × for magnesium electrons, ● for oxygen electrons an
- June 2024, Paper 2, Q3(a) (1 mark): Draw a dot‑and‑cross diagram of a molecule of hydrogen peroxide. (1)
- June 2024, Paper 2, Q7(d)(i) (2 marks): Explain why ethane‑1,2‑diol is soluble in water. A detailed description of the forces involved is not required. (2)
- June 2024, Paper 3, Q2(a) (3 marks): Explain how London forces arise. (3)
- June 2024, Paper 3, Q2(b) (2 marks): Explain which of the compounds A–D will have the highest boiling temperature. (2)
- June 2024, Paper 3, Q2(c) (3 marks): The apparatus shown may be used in an experiment to compare how far, if at all, a charged rod deflects different liquids. burette charged rod stream of liquid +
- June 2024, AS Paper 1, Q5(d) (1 mark): The strongest of the attractions between molecules in liquid chlorine dioxide is (1) A covalent bonding B hydrogen bonding C ionic bonding D permanent dipoles
- June 2024, AS Paper 1, Q5(e)(i) (2 marks): Complete a dot‑and‑cross diagram for the chlorate(III) ion, ClO2 – . Use crosses (×) for chlorine electrons, dots (•) for oxygen electrons and a triangle () fo
- June 2024, AS Paper 1, Q5(e)(ii) (3 marks): Predict the bond angle in this ion. Justify your answer. (3)
- June 2024, AS Paper 1, Q8(a)(i) (4 marks): Explain, using suitable labelled diagrams, why water is a good solvent for calcium chloride. (4)
- June 2024, AS Paper 1, Q8(a)(ii) (3 marks): Explain why methanol dissolves in water. Include a suitable labelled diagram. (3)
- June 2024, AS Paper 1, Q8(b)(i) (3 marks): Data about two isomeric alkanes are shown. Compound Formula Boiling temperature / K 2,2‑dimethylpropane C(CH3)4 283 pentane CH3(CH2)3CH3 309 Explain why pentane
- June 2023, Paper 1, Q3(c)(i) (2 marks): Draw a labelled diagram of a simple experiment to confirm this dissociation has occurred, stating the positive result. (2) Result
- June 2023, Paper 1, Q3(c)(ii) (1 mark): What is the shape of the ICl4 – ion? (1) A octahedral B square planar C tetrahedral D trigonal bipyramidal
- June 2023, Paper 1, Q6(b) (2 marks): The ionic salts sodium benzoate and potassium benzoate are both used as food preservatives. Explain why the melting temperature of sodium benzoate is higher tha
- June 2023, Paper 1, Q10(a) (1 mark): Draw the dot‑and‑cross diagram for an oxygen molecule, O2 . Show outer shell electrons only. (1)
- June 2023, Paper 1, Q10(b) (4 marks): The solubility of oxygen in water under standard conditions is 1.22 × 10–3 mol dm–3. Comment on this value by considering the type and strength of the intermole
- June 2023, Paper 2, Q7(a) (4 marks): Ethanal, CH3CHO, and ethanoic acid, CH3COOH, are both soluble in water but ethanoic acid has a much higher boiling temperature than ethanal. Explain these physi
- June 2023, Paper 3, Q3(c) (2 marks): Draw the dot‑and‑cross diagram of sulfuric acid, H2SO4 . Clearly differentiate between sulfur, oxygen and hydrogen electrons. Show outer shell electrons only. (
- June 2023, AS Paper 1, Q3(a)(iii) (2 marks): The equation for the reaction between aluminium and bromine is shown. 2Al + 3Br2 → Al2Br6 The compound is a dimer made up of two covalently bonded monomers join
- June 2023, AS Paper 1, Q3(b)(i) (2 marks): Explain how the trend in bond length relates to the trend in bond strength on descending the group. (2)
- June 2023, AS Paper 1, Q5(a) (1 mark): State what is meant by the term electronegativity. (1)
- June 2023, AS Paper 1, Q5(c) (2 marks): Describe what you understand by the term ‘continuum of bonding type’ in relation to electronegativities. (2)
- June 2023, AS Paper 1, Q5(d) (3 marks): The table gives data for chlorine and chlorine compounds of some Period 3 elements. The data show evidence that the type of bonding in compounds is a continuum
- June 2023, AS Paper 1, Q7(a) (1 mark): Draw a dot‑and‑cross diagram of the ionic compound potassium chloride. Show outer shell electrons only. (1)
- June 2023, AS Paper 1, Q7(b) (4 marks): Deduce the order of increasing size of the ions: Br–, Ca2+, Cl–, K+ Justify your answer. (4)
- June 2023, AS Paper 2, Q7(a) (1 mark): Which are the intermolecular force(s) between butan‑1‑ol molecules in the liquid phase? (1) A hydrogen bonding only B hydrogen bonding and permanent dipole‑dipo
- June 2022, Paper 1, Q3(e)(i) (1 mark): Which diagram shows the trend in the boiling temperatures of the hydrogen halides? (1) A B 300 300 Boiling Boiling 250 250 temperature temperature 200 200 / K /
- June 2022, Paper 1, Q4(a) (1 mark): Ionic bonding is the strong electrostatic attraction between (1) A anions and cations B atoms and delocalised electrons C cations and delocalised electrons D tw
- June 2022, Paper 1, Q4(b) (2 marks): An aqueous solution of copper(II) chromate(VI) was electrolysed using the apparatus shown in the diagram. 6 V DC + – F E copper(II) chromate(VI) solution Deduce
- June 2022, Paper 1, Q4(c) (1 mark): Some ionic radii are given in the table. Ion Ionic radius / nm Na+ 0.102 Mg2+ 0.072 Cl– 0.180 Br– 0.195 Deduce the formula of the compound, formed from the ions
- June 2022, Paper 1, Q4(e) (6 marks): Water has two significant anomalous properties: • it has a higher melting temperature than hydrogen sulfide, H2S, even though it has fewer electrons in its mole
- June 2022, Paper 1, Q7(b) (2 marks): The bonding in chromate(VI) ions, CrO4 Draw a possible dot‑and‑cross diagram for a chromate(VI) ion. (2)
- June 2022, Paper 2, Q2(b) (2 marks): Explain why 2,2‑dimethylpropane has a much lower boiling temperature than its isomer pentane. Detailed descriptions of the forces involved are not required. (2)
- June 2022, Paper 2, Q4(b) (2 marks): Draw dot‑and‑cross diagrams for a molecule of nitrogen gas and for the nitride ion, N3–, in sodium nitride, Na3N. Use dots () for nitrogen electrons and crosse
- June 2022, Paper 2, Q4(c) (4 marks): Ammonia accepts a proton to form an ammonium ion. NH3 + H+ → NH4 + Explain why the ammonia molecule and the ammonium ion have different shapes and different bon
- June 2022, Paper 2, Q5(a) (2 marks): About 200 cm3 of water and 200 cm3 of cooking oil were placed in a large beaker and two layers formed. The cooking oil formed the upper layer. An ice cube made
- June 2022, Paper 2, Q6(d)(i) (4 marks): Explain, by reference to the data and any intermolecular forces involved, the difference in the boiling temperatures. (4)
- June 2022, Paper 2, Q6(d)(ii) (2 marks): Explain, with the aid of a diagram, why propanone is completely miscible with water. (2)
- June 2022, Paper 3, Q2(a)(ii) (3 marks): Explain the shape of the cobalt(II) ion, [Co(H2O)6]2+ , using electron‑pair repulsion theory. (3)
- June 2022, AS Paper 1, Q5(a) (1 mark): The table gives the melting temperatures of some Group 7 hydrogen halides. Compound Melting temperature / K HF 190 HCl 158 HBr 185 Predict the melting temperatu
- June 2022, AS Paper 1, Q5(b) (1 mark): The compounds in the table are isomers. Compound Structural formula Boiling temperature / °C hexane CH3CH2CH2CH2CH2CH3 69 CH3CH2CH2CHCH3 2‑methylpentane 61 CH3
- June 2022, AS Paper 1, Q5(c) (6 marks): Methanol, CH3OH, is miscible with water in all proportions. Sodium chloride is much less soluble in methanol than in water. Explain these statements using your
- June 2022, AS Paper 1, Q7(c)(i) (1 mark): Draw a dot‑and‑cross diagram for the nitrate(V) ion, NO3 –, showing outer electrons only. (1) – O N O O
- June 2022, AS Paper 1, Q8(b)(i) (1 mark): Hydrogen chloride gas does not conduct electricity. Hydrochloric acid is a good conductor of electricity. Give a reason for this change in conductivity. (1)
- November 2021, Paper 1, Q3(a) (2 marks): Catalytic converters contain metals such as platinum. Describe the bonding in platinum. You may include a diagram in your answer. (2)
- November 2021, Paper 2, Q5(c)(ii) (2 marks): Explain why compound X is likely to have a higher boiling temperature than hydrocarbons of a similar molecular mass and shape. A detailed description of how the
- November 2021, Paper 2, Q6(a) (2 marks): Draw a dot-and-cross diagram of a molecule of carbon monoxide. Use dots (•) for the carbon electrons and crosses (×) for the oxygen electrons. (2)
- November 2021, Paper 3, Q3(b)(i) (1 mark): Draw a dot-and-cross diagram of an aluminium chloride molecule, AlCl3. Show the outer shell electrons only. (1)
- November 2021, Paper 3, Q3(b)(ii) (2 marks): Predict the shape of an AlCl3 molecule and the Cl−Al−Cl bond angle. (2) Shape of AlCl3 Cl−Al−Cl bond angle
- November 2021, Paper 3, Q3(c)(i) (1 mark): Draw a diagram to show how two AlCl3 molecules are joined together in the dimer. (1)
- November 2021, Paper 3, Q3(c)(ii) (1 mark): State the type of bond that joins the two AlCl3 molecules together. (1)
- November 2021, Paper 3, Q6(a)(ii) (2 marks): A mixture of 2-nitrophenol and 4-nitrophenol is produced in Stage 1. They are separated by steam distillation. The boiling temperature of 2-nitrophenol is 215°C
- November 2021, AS Paper 1, Q3(a)(ii) (3 marks): Draw diagrams showing the 3-dimensional shape of an ammonia molecule and of an amide ion, NH2 –. Include any lone pairs of electrons in each species. (3) ammoni
- November 2021, AS Paper 1, Q3(a)(iii) (1 mark): What is the H–N–H bond angle in an ammonia molecule? (1) A 104.5° B 107° C 109.5° D 120°
- November 2021, AS Paper 1, Q3(a)(iv) (2 marks): Explain the difference between the H–N–H bond angle in ammonia and in the amide ion. (2)
- November 2021, AS Paper 1, Q4(c)(i) (2 marks): Plot a graph of atomic number of the Group 6 element on the x-axis against melting temperature of the dihydrogen compound on the y-axis. (2) 300 250 Melting tem
- November 2021, AS Paper 1, Q4(c)(ii) (1 mark): Give an estimate of the melting temperature of H2S. (1)
- November 2021, AS Paper 1, Q7(a) (2 marks): State the meaning of the term ‘ionic bond’. (2)
- November 2021, AS Paper 2, Q5(c) (1 mark): Draw a dot‑and‑cross diagram for sulfur dioxide, showing outer electrons only. (1)
- November 2021, AS Paper 2, Q7(b) (3 marks): Explain why methanol and water are ‘soluble in all proportions’. You must include a diagram in your answer. (3)
- October 2020, Paper 1, Q3(a) (4 marks): Describe the bonding in the element chromium and use your answer to justify why it has such a high melting temperature. You may find it helpful to draw a labell
- October 2020, Paper 1, Q4(c) (6 marks): The solubility of two compounds in different solvents was investigated. A summary of the findings is shown. Compound Soluble in water Soluble in hexane 2-methyl
- October 2020, Paper 1, Q5(b)(i) (2 marks): Draw dot-and-cross diagrams for the ions in magnesium hydroxide. Show the outer electrons only. (2)
- October 2020, Paper 1, Q7(b)(i) (1 mark): The two O−C−H bond angles, x and y, in the ester are approximately (1) A 180° and 90° B 120° and 90° C 120° and 109.5° D 109.5° and 109.5°
- October 2020, Paper 1, Q8(b)(i) (2 marks): Complete the dot-and-cross diagram for the ethanedioate ion. Show the outer electrons only. (2) 2− O O C C O O
- October 2020, Paper 2, Q1(a) (2 marks): Draw a dot-and-cross diagram to show the bonding in a molecule of methanol. Show outer shell electrons only. (2)
- October 2020, Paper 2, Q1(b) (1 mark): Predict which bond has the shortest bond length in a molecule of methanol. (1)
- October 2020, Paper 2, Q1(c)(i) (1 mark): State the strongest type of intermolecular force that occurs between molecules of methanol and water. (1)
- October 2020, Paper 2, Q1(c)(ii) (3 marks): Draw a labelled diagram to show the interaction named in (c)(i) between one molecule of methanol and one molecule of water. Include any relevant lone pairs and
- October 2020, AS Paper 1, Q3(a)(i) (2 marks): Explain what is meant by a covalent bond. (2)
- October 2020, AS Paper 1, Q3(a)(ii) (1 mark): Draw a dot‑and‑cross diagram for hydrazine, showing the outer electrons only. Use crosses (×) to represent the electrons from nitrogen and dots ( • ) to represe
- October 2020, AS Paper 1, Q3(a)(iii) (1 mark): Estimate the H N H bond angle in hydrazine. (1) Bond angle =
- October 2020, AS Paper 1, Q3(b) (3 marks): Hydrazine is very soluble in water. Explain, using a labelled diagram and naming the relevant intermolecular interactions, why hydrazine is very soluble in wate
- October 2020, AS Paper 1, Q8(c)(ii) (1 mark): Name all the types of bond present in calcium carbonate. (1)
- October 2020, AS Paper 1, Q8(c)(iii) (1 mark): Give a reason, in terms of the bonding, why a high decomposition temperature is required. (1)
- October 2020, AS Paper 2, Q5(b)(i) (1 mark): Add the dipole to a molecule of iodine monochloride. (1) I Cl
- June 2019, Paper 1, Q1(d) (1 mark): Which of these isoelectronic ions has the largest ionic radius? (1) A N3– B O2– C Na+ D Al3+
- June 2019, Paper 1, Q6(a) (4 marks): Water might be expected to have a lower boiling temperature than hydrogen sulfide but it actually has a higher boiling temperature. Comment on this statement by
- June 2019, Paper 1, Q6(b) (4 marks): Explain why both water and carbon dioxide molecules have polar bonds but only water is a polar molecule. (4)
- June 2019, Paper 1, Q6(c) (2 marks): Pure water ionises to form H3O+ and OH– ions, although only to a very small extent. Draw the dot-and-cross diagrams of these ions. Use dots (•) for the hydrogen
- June 2019, Paper 2, Q7(a) (2 marks): Draw a dot-and-cross diagram for nitrosyl chloride, showing only the outer shell electrons. N (2)
- June 2019, Paper 3, Q5(e)(i) (1 mark): Draw a dot-and-cross diagram of the BH4 Use crosses (×) for the boron electrons, dots (•) for the hydrogen electrons and triangles ( V ) for the additional elec
- June 2019, AS Paper 1, Q8(a) (3 marks): Explain the difference in the melting temperatures of magnesium oxide and potassium bromide. (3)
- June 2019, AS Paper 1, Q9(a)(ii) (4 marks): A dot-and-cross diagram for the chlorate(V) ion (ClO3 – O ⎡ Key ⎢ = chlorine electrons O Cl O ⎢ = an added electron ⎢ ⎣ = oxygen electrons Cl Predict the shape
- June 2019, AS Paper 1, Q9(e)(i) (2 marks): Describe, using diagrams to illustrate your answer, the interactions between each of the ions and the solvent when sodium chlorate(I) dissolves in water. (2)
- June 2019, AS Paper 1, Q9(e)(ii) (2 marks): The displayed formulae of ethanol and chloroethane are shown. H H H H H C C Cl H C C O H H H H H ethanol chloroethane Ethanol is very soluble in water whereas c
- June 2019, AS Paper 2, Q1(a)(ii) (3 marks): Explain why isomers of the alkane in (a)(i) have lower boiling temperatures and so are found in the petrol fraction. (3)
- June 2018, Paper 1, Q7(b)(i) (2 marks): Complete the dot-and-cross diagram of a molecule of boric acid. Show the outer shell electrons only. Use dots (•) for the hydrogen electrons, crosses (×) for th
- June 2018, Paper 1, Q7(b)(ii) (1 mark): What are the O B O and B O H bond angles in a molecule of boric acid? (1) O B O bond angle B O H bond angle A 109.5° 104.5° B 109.5° 180° C 120° 104.5° D 120° 1
- June 2018, Paper 1, Q7(c) (1 mark): Boric acid is a solid with melting temperature 171 °C. What are the strongest interactions between the molecules in solid boric acid? (1) A covalent bonds B hyd
- June 2018, Paper 3, Q1(a)(i) (3 marks): Describe how London forces form between halogen molecules. (3)
- June 2018, Paper 3, Q1(a)(ii) (2 marks): The boiling temperatures of chlorine and bromine are shown in the table. Halogen Boiling temperature / °C chlorine −34 bromine 59 Explain why bromine has a high
- June 2018, AS Paper 1, Q1(a) (2 marks): State what is meant by the term covalent bond. (2)
- June 2018, AS Paper 1, Q1(b) (2 marks): Draw a diagram of the ammonia molecule, clearly showing its shape. Include any lone pairs of electrons and the value of the bond angle. (2)
- June 2018, AS Paper 1, Q1(c) (1 mark): The dot-and-cross diagram of BF3 is F F B F What is the bond angle in BF3? (1) A 90° B 107° C 109.5° D 120°
- June 2018, AS Paper 1, Q1(d)(i) (2 marks): Ammonia and boron trifluoride react to form a compound NH3BF3 which contains a dative covalent bond. Each of the molecules, NH3 and BF3, has a different feature
- June 2018, AS Paper 1, Q1(d)(ii) (2 marks): During this reaction, the bond angles about the nitrogen atom and the boron atom change. State the new H N H and F B F bond angles. (2)
- June 2018, AS Paper 1, Q7 (6 marks): *7 The compounds hydrogen fluoride, water and methane, all have simple molecular structures, but they have significantly different boiling temperatures. Discuss
- June 2018, AS Paper 1, Q8(a)(ii) (3 marks): Draw dot-and-cross diagrams of the ions in sodium fluoride, showing all the electrons. Use your diagram to explain why the ions are described as isoelectronic.
- June 2018, AS Paper 1, Q8(a)(iii) (1 mark): Which diagram shows the trend in ionic radius for the isoelectronic ions N3− to Al3+? (1) A B Ionic Ionic radius radius F− (Ne) Na+ Mg2+ Al3+ F− (Ne) Na+ Mg2+ A
- June 2018, AS Paper 1, Q8(a)(iv) (2 marks): Explain your answer to (a)(iii) in terms of the structure of the ions. (2)
- June 2018, AS Paper 1, Q8(b) (2 marks): The strength of ionic bonding in different compounds can be compared by using the amount of energy required to separate the ions. Some values for this energy ar
- June 2017, Paper 1, Q1(b)(i) (2 marks): Explain why a phosphorus(III) chloride molecule has this shape and bond angle. (2)
- June 2017, Paper 1, Q1(b)(ii) (1 mark): Which describes the polarity of the P—Cl bond and the polarity of the phosphorus(III) chloride molecule? (1) Polarity of P—Cl bond Polarity of molecule A non-po
- June 2017, Paper 1, Q6(a)(i) (1 mark): Draw a dot-and-cross diagram to show the bonding in magnesium bromide. Only outer shell electrons are required. (1)
- June 2017, Paper 2, Q3(d) (3 marks): Explain why ethene has a boiling temperature of −104 °C, whereas ethanol has a boiling temperature of 78 °C. (3)
- June 2017, AS Paper 1, Q2(a)(i) (1 mark): The O–H bond in water is polar because, when compared with the hydrogen atom, the oxygen atom has (1) A a higher mass number B a larger atomic radius C greater
- June 2017, AS Paper 1, Q2(a)(ii) (2 marks): Draw a diagram of a hydrogen bond between two water molecules in ice. Show the value of the H–O–H angle within a molecule and the value of the O–H–O angle betwe
- June 2017, AS Paper 1, Q2(a)(iii) (2 marks): Explain why hydrogen bonding causes ice to be less dense than liquid water. (2)
- June 2017, AS Paper 1, Q5(a)(ii) (1 mark): The bonding in magnesium results from (1) A strong electrostatic attractions between oppositely charged ions B strong electrostatic attractions between the nucl
- June 2017, AS Paper 1, Q6(a)(ii) (1 mark): Draw a dot-and-cross diagram for BCl3 showing only the outer shell electrons of the atoms. (1)
- June 2017, AS Paper 1, Q6(a)(iii) (2 marks): Use your diagram to explain why BCl3 has a trigonal planar shape with bond angles of 120q. (2)
- June 2017, AS Paper 1, Q6(c) (6 marks): Aluminium fluoride and aluminium chloride are both crystalline solids at room temperature. Aluminium fluoride sublimes to form a gas at 1291qC (1564 K), whilst
- June 2017, AS Paper 2, Q1 (1 mark): Which compound does not have hydrogen bonding between its molecules? Name of compound Formula of compound A fluoromethane CH3F B hydrogen fluoride HF C hydrogen
- June 2017, AS Paper 2, Q2 (1 mark): Which molecule has a linear shape? A H2S B SO2 C CO2 D CH2 CH2
- June 2016, AS Paper 1, Q1(d) (3 marks): State what is meant by the term electronegativity and hence explain the polarity, if any, of the bonds in chlorine trifluoride, ClF3. (3)
- June 2016, AS Paper 1, Q5(c) (3 marks): Complete the dot-and-cross diagram for the bonding in nitric acid, showing only outer shell electrons. Use (•) for the oxygen electrons, (x) for the nitrogen el
- June 2016, AS Paper 1, Q6(a) (2 marks): The diagram shows bond angles in ammonia and water. N O 107° 104.5° H H H H H Explain why the bond angle in water is less than the bond angle in ammonia. (2)
- June 2016, AS Paper 1, Q6(b) (3 marks): Explain why the O–H and S–H bond lengths are different. S O 133.6 pm 95.7 pm H H H H (3)
Questions, mark schemes and examiner’s reports are © Pearson Edexcel, from their published past papers. Plumi isn’t affiliated with any exam board. Want whole papers? Every Edexcel A-Level Chemistry paper.
Rather write your answers by hand on iPad? Plumi marks them against the same mark schemes.