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The Periodic Table: Eduqas A‑Level Chemistry questions

Every Eduqas A-Level Chemistry exam question on C1.6 The Periodic Table, 2016–2025, with its mark scheme and examiner’s report.

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1,513 questions

  1. Q1

    June 2025 · Component 1

    2 marksC1.6 The Periodic Table
    The whole paper ↗
    June 2025 Component 1, question 1: State the colours observed in flame tests for compounds containing the following ions. [2] Potassium ions ……… …………………………………………….. Lithium ions ……… …………………………………

  2. Q10(a)

    June 2025 · Component 1

    1 markC1.6 The Periodic Table
    The whole paper ↗
    June 2025 Component 1, question 10(a): State why these elements are classed as part of the p-block. [1]

  3. Q10(b)(i)

    June 2025 · Component 1

    1 markC1.6 The Periodic Table
    The whole paper ↗
    June 2025 Component 1, question 10(b)(i): Identify the most electronegative element in the table. [1]

  4. Q10(b)(ii)

    June 2025 · Component 1

    1 markC1.6 The Periodic Table
    The whole paper ↗
    June 2025 Component 1, question 10(b)(ii): Give an element that forms an oxide of formula XO2 and a hydride of formula H2X. [1]

  5. Q10(b)(iii)

    June 2025 · Component 1

    1 markC1.6 The Periodic Table
    The whole paper ↗
    June 2025 Component 1, question 10(b)(iii): Identify the element that gives purple fumes when the solid is heated. [1]

  6. Q10(c)(iii)

    June 2025 · Component 1

    3 marksC1.6 The Periodic Table
    The whole paper ↗
    June 2025 Component 1, question 10(c)(iii): Explain why addition of chlorine to a solution containing bromide ions causes a chemical reaction but addition of iodine to a solution containing bromide ions d

  7. Q11(b)(i)

    June 2025 · Component 1

    1 markC1.6 The Periodic Table
    The whole paper ↗
    June 2025 Component 1, question 11(b)(i): Write the equation for the reaction between calcium and water. [1]

  8. Q2

    June 2025 · AS Component 1

    2 marksC1.6 The Periodic Table
    The whole paper ↗
    June 2025 AS Component 1, question 2: Describe how flame tests are carried out and how they can be used to differentiate between sodium chloride and potassium chloride. Give the expected observation

  9. Q6

    June 2025 · AS Component 1

    1 markC1.6 The Periodic Table
    The whole paper ↗
    June 2025 AS Component 1, question 6: Write an equation for the reaction of fluorine with iron to form iron(III) fluoride. [1]

  10. Q11(d)

    June 2025 · AS Component 1

    1 markC1.6 The Periodic Table
    The whole paper ↗
    June 2025 AS Component 1, question 11(d): State why the student’s method would not work with magnesium hydroxide. [1]

  11. Q13(b)

    June 2025 · AS Component 1

    3 marksC1.6 The Periodic Table
    The whole paper ↗
    June 2025 AS Component 1, question 13(b): Three strips of white filter paper were soaked in three different potassium halides – chloride, bromide and iodide. The paper strips were dried. Describe a simp

  12. Q13(c)

    June 2025 · AS Component 1

    6 marksC1.6 The Periodic Table
    The whole paper ↗
    June 2025 AS Component 1, question 13(c): A student is given 5.00 g of a solid mixture of calcium chloride and sodium chloride and asked to determine the percentage by mass of calcium chloride in the mi

  13. Q9(c)(iii)

    June 2024 · Component 1

    1 markC1.6 The Periodic Table
    The whole paper ↗
    June 2024 Component 1, question 9(c)(iii): State the purpose of adding chlorine to water for public supply. [1]

  14. Q14(a)

    June 2024 · Component 1

    6 marksC1.6 The Periodic Table
    The whole paper ↗
    June 2024 Component 1, question 14(a): You are provided with six unlabelled solid mixtures. A lead(II) nitrate and magnesium chloride B magnesium chloride and barium chloride C barium chloride and co

  15. Q14(b)(i)

    June 2024 · Component 1

    1 markC1.6 The Periodic Table
    The whole paper ↗
    June 2024 Component 1, question 14(b)(i): Give the observations expected with these solutions when aqueous silver nitrate is added. [1] Solution G Solution H

  16. Q14(b)(ii)

    June 2024 · Component 1

    2 marksC1.6 The Periodic Table
    The whole paper ↗
    June 2024 Component 1, question 14(b)(ii): Give a further test that would allow you to confirm which of the two solutions you were given. [2]

  17. Q14(c)(i)

    June 2024 · Component 1

    2 marksC1.6 The Periodic TablePI2.1 Chemistry of the p-block
    The whole paper ↗
    June 2024 Component 1, question 14(c)(i): State what is observed when aqueous lead(II) nitrate is added to solution J. Give an ionic equation for the reaction. [2]

  18. Q6(a)

    June 2024 · AS Component 1

    2 marksC1.6 The Periodic Table
    The whole paper ↗
    June 2024 AS Component 1, question 6(a): Explain why the noble gases exist as monatomic particles. [2]

  19. Q9(a)

    June 2024 · AS Component 1

    1 markC1.6 The Periodic Table
    The whole paper ↗
    June 2024 AS Component 1, question 9(a): Name this type of reaction. [1]

  20. Q10(b)(i)

    June 2024 · AS Component 1

    1 markC1.6 The Periodic Table
    The whole paper ↗
    June 2024 AS Component 1, question 10(b)(i): Give a reason why the solution appeared cloudy. [1]
All 91 questions on The Periodic Table, as a list
  1. June 2025, Component 1, Q1 (2 marks): State the colours observed in flame tests for compounds containing the following ions. [2] Potassium ions ……… …………………………………………….. Lithium ions ……… …………………………………
  2. June 2025, Component 1, Q10(a) (1 mark): State why these elements are classed as part of the p-block. [1]
  3. June 2025, Component 1, Q10(b)(i) (1 mark): Identify the most electronegative element in the table. [1]
  4. June 2025, Component 1, Q10(b)(ii) (1 mark): Give an element that forms an oxide of formula XO2 and a hydride of formula H2X. [1]
  5. June 2025, Component 1, Q10(b)(iii) (1 mark): Identify the element that gives purple fumes when the solid is heated. [1]
  6. June 2025, Component 1, Q10(c)(iii) (3 marks): Explain why addition of chlorine to a solution containing bromide ions causes a chemical reaction but addition of iodine to a solution containing bromide ions d
  7. June 2025, Component 1, Q11(b)(i) (1 mark): Write the equation for the reaction between calcium and water. [1]
  8. June 2025, AS Component 1, Q2 (2 marks): Describe how flame tests are carried out and how they can be used to differentiate between sodium chloride and potassium chloride. Give the expected observation
  9. June 2025, AS Component 1, Q6 (1 mark): Write an equation for the reaction of fluorine with iron to form iron(III) fluoride. [1]
  10. June 2025, AS Component 1, Q11(d) (1 mark): State why the student’s method would not work with magnesium hydroxide. [1]
  11. June 2025, AS Component 1, Q13(b) (3 marks): Three strips of white filter paper were soaked in three different potassium halides – chloride, bromide and iodide. The paper strips were dried. Describe a simp
  12. June 2025, AS Component 1, Q13(c) (6 marks): A student is given 5.00 g of a solid mixture of calcium chloride and sodium chloride and asked to determine the percentage by mass of calcium chloride in the mi
  13. June 2024, Component 1, Q9(c)(iii) (1 mark): State the purpose of adding chlorine to water for public supply. [1]
  14. June 2024, Component 1, Q14(a) (6 marks): You are provided with six unlabelled solid mixtures. A lead(II) nitrate and magnesium chloride B magnesium chloride and barium chloride C barium chloride and co
  15. June 2024, Component 1, Q14(b)(i) (1 mark): Give the observations expected with these solutions when aqueous silver nitrate is added. [1] Solution G Solution H
  16. June 2024, Component 1, Q14(b)(ii) (2 marks): Give a further test that would allow you to confirm which of the two solutions you were given. [2]
  17. June 2024, Component 1, Q14(c)(i) (2 marks): State what is observed when aqueous lead(II) nitrate is added to solution J. Give an ionic equation for the reaction. [2]
  18. June 2024, AS Component 1, Q6(a) (2 marks): Explain why the noble gases exist as monatomic particles. [2]
  19. June 2024, AS Component 1, Q9(a) (1 mark): Name this type of reaction. [1]
  20. June 2024, AS Component 1, Q10(b)(i) (1 mark): Give a reason why the solution appeared cloudy. [1]
  21. June 2024, AS Component 1, Q10(b)(iii) (1 mark): State how a flame test could be used to prove that the impurity was not calcium hydroxide. [1]
  22. June 2024, AS Component 1, Q11(a) (1 mark): Write a half-equation for the oxidation of bromide ions. [1]
  23. June 2024, AS Component 1, Q11(c) (1 mark): Chlorine can be used as an oxidising agent. Explain why chlorine can oxidise bromide ions. [1]
  24. June 2024, AS Component 1, Q11(e)(i) (2 marks): He added an aqueous solution of iodine to an aqueous solution of potassium bromide. He observed a brown colour in the test tube. He decided that the brown colou
  25. Autumn 2021, Component 1, Q1 (1 mark): Give a reason why chlorine is used in the treatment of domestic water supplies. [1]
  26. Autumn 2021, Component 1, Q12(c)(iii) (1 mark): The experiment in part (ii) is repeated using barium carbonate in the place of magnesium carbonate. State and explain any differences in the observations for th
  27. Autumn 2021, Component 1, Q14(b) (1 mark): Limestone is a common rock which consists mainly of calcium carbonate, but often contains dolomite [CaMg(CO3)2] as well as insoluble, inert impurities such as s
  28. Autumn 2021, Component 1, Q14(d)(iii) (2 marks): Limestone is a common rock which consists mainly of calcium carbonate, but often contains dolomite [CaMg(CO3)2] as well as insoluble, inert impurities such as s
  29. Autumn 2021, Component 1, Q15(b) (6 marks): Identify the ionic compounds dissolved in solutions A-D. You should explain clearly how you have reached your conclusions. [6 QER] Identities of compounds A B
  30. Autumn 2021, Component 3, Q3 (6 marks): A student is asked to identify the contents of six test tubes containing aqueous solutions of the following six inorganic compounds. barium nitrate potassium io
  31. Autumn 2020, Component 1, Q2 (2 marks): Give the formulae of the four sulfur-containing products of the reaction of sodium iodide, NaI, with concentrated sulfuric acid. [2]
  32. Autumn 2020, Component 1, Q13(a) (4 marks): The student labels seven possible results as A-G. He is able to suggest likely identities for anions that would give six of these results, and his teacher said
  33. Autumn 2020, Component 1, Q13(b) (3 marks): The planned method would not be suitable for identifying all these anions in sodium compounds. Explain why the method would not be suitable and suggest how it c
  34. Autumn 2020, Component 1, Q13(d) (3 marks): The student is provided with a solution containing chloride as the only anion. He is told that the solution also contains sodium ions, magnesium ions, or a mixt
  35. Autumn 2020, Component 3, Q2(a) (1 mark): Describe how the student could have confirmed experimentally that all of the barium ions had been precipitated in step 1. [1]
  36. Autumn 2020, Component 3, Q3(a) (4 marks): Use all the information provided to suggest the identity of element X. Show your reasoning and include ionic equations to support your answer. [4]
  37. Autumn 2020, Component 3, Q3(b) (6 marks): Use all the information provided to suggest the identity of element Y. Show your reasoning and include an equation to support your answer. [6]
  38. Autumn 2020, AS Component 1, Q10(a) (4 marks): Give the names of compounds A to D. [4] A B C D
  39. Autumn 2020, AS Component 1, Q10(b) (1 mark): Suggest a reagent that would convert B into D. [1]
  40. Autumn 2020, AS Component 1, Q10(c) (1 mark): State how the conversion of C into A could be carried out. [1]
  41. Autumn 2020, AS Component 1, Q10(d) (2 marks): Write the ionic equation for the conversion of A into B. Include state symbols. [2]
  42. Autumn 2020, AS Component 1, Q10(e) (2 marks): What would be observed, if anything, if aqueous sodium hydroxide were added dropwise and then to excess to solution D? [2] Dropwise Excess
  43. Autumn 2020, AS Component 1, Q10(f) (2 marks): Suggest a test that would confirm the cation present in compounds A to D. Include the test and the expected result. [2] Test Result
  44. June 2019, Component 1, Q9(b)(iii) (2 marks): NaHSO4 can also be formed by reaction of concentrated sulfuric acid with sodium halides such as sodium chloride, sodium bromide or sodium iodide. When concentra
  45. June 2019, Component 1, Q10(a) (2 marks): The student had to select an appropriate strong acid from the common laboratory reagents. Suggest an appropriate acid to use. Explain your choice. [2]
  46. June 2019, Component 1, Q10(b) (3 marks): In step 2 a white precipitate of mass 0.0672 g was produced. State which ion this step identifies and calculate the number of moles of this ion present in the o
  47. June 2019, Component 1, Q10(c) (2 marks): After completing step 2, the student decides that he does not need to carry out step 3. Is he correct? Give a reason for your answer. [2]
  48. June 2019, Component 1, Q10(d)(ii) (1 mark): When the student heats the precipitate to ensure it is dry, a colour change is seen with some of the solid turning black but most of it remaining blue. He did n
  49. June 2019, Component 1, Q11(b)(ii) (6 marks): Suggest values for the missing properties of selenium. Use the ideas you have studied to explain the values you have chosen. [6 QER]
  50. June 2019, Component 1, Q12(a) (1 mark): Give one large scale use of the element chlorine. [1]
  51. June 2019, Component 1, Q12(b) (1 mark): Chlorine reacts with hot concentrated sodium hydroxide solution to form two chlorine-containing products. Write the equation for this reaction. [1]
  52. June 2019, Component 3, Q4 (6 marks): A solid waste sample is known to contain only sodium carbonate, sodium nitrate and sodium sulfate. Outline an experimental procedure to show that • the sample c
  53. June 2019, AS Component 1, Q4 (2 marks): Halogens and their compounds are used in water treatment. State one halogen and one halide that are commonly used in water treatment. In each case give a reason
  54. June 2019, AS Component 1, Q8(a) (3 marks): A student said that the Periodic Table was a list of the elements arranged in order of increasing mass. Another student said that this was not the case since it
  55. June 2019, AS Component 1, Q10(a) (3 marks): When dilute sulfuric acid is added to aqueous magnesium chloride no visible change occurs but when it is added to aqueous barium chloride a white precipitate is
  56. June 2019, AS Component 1, Q11(a)(iii) (2 marks): When silicon chloride is added to water, solid silicon oxide and a solution with a pH of less than 7 are formed. Write the equation for this reaction. Include s
  57. June 2018, Component 1, Q5 (1 mark): Calcium metal reacts slowly with water. Write an equation for this reaction. [1]
  58. June 2018, Component 1, Q11(a) (1 mark): All of the samples provided were white. State which one of the compounds from the list above could not be amongst the samples. Give a reason for your answer. [1
  59. June 2018, Component 1, Q11(b)(i) (1 mark): Explain why the method as written would not conclusively identify all the unknown samples that contain carbonate ions. [1]
  60. June 2018, Component 1, Q11(b)(ii) (3 marks): Her teacher says that hydrochloric acid is not the correct reagent to use in this method. Give two reasons why hydrochloric acid is not appropriate and suggest
  61. June 2018, Component 1, Q11(b)(iii) (2 marks): Another student starts her method with a flame test. State which s-block cations she could identify by this method, giving the colours expected for each. [2]
  62. June 2018, Component 1, Q11(b)(iv) (4 marks): As time was short the teacher suggested the following simplified method. • Look at the colour of the sample • Carry out a flame test to identify s-block cations
  63. June 2018, Component 1, Q13(b) (4 marks): An alternative method is gravimetric analysis. Another sample of alloy is dissolved in concentrated nitric acid. The solution is neutralised and aqueous sodium
  64. June 2018, Component 3, Q3 (10 marks): A student was asked to identify four inorganic salts, labelled P, Q, R and S, by their reaction with aqueous sodium hydroxide and by the interactions between th
  65. June 2018, AS Component 1, Q10(a)(ii) (1 mark): Name a solution which could be added to the lead(II) solution to form lead(II) sulfate. [1]
  66. June 2018, AS Component 1, Q10(a)(iii) (2 marks): Write an ionic equation for the reaction used to form lead(II) sulfate. Include state symbols. [2]
  67. June 2018, AS Component 1, Q10(a)(iv) (3 marks): Describe how the lead(II) sulfate precipitate should be treated to obtain results for quantitative analysis. Explain your answer. [3]
  68. June 2018, AS Component 1, Q10(b)(ii) (1 mark): The balance used in the experiment could be read to 2 decimal places. Two weighings were made to find the mass of lead(II) sulfate. Calculate the maximum percen
  69. June 2018, AS Component 1, Q10(c) (2 marks): Some samples of cerrusite are thought to contain other carbonates in addition to the lead(II) carbonate. Suggest how this hypothesis could be investigated in a
  70. June 2018, AS Component 1, Q11(c) (2 marks): The student left the bottle of calcium hydroxide solution overnight without its stopper in place. Explain what he observed when he returned next day. [2]
  71. June 2018, AS Component 1, Q11(d) (1 mark): The student decided to repeat the titration using a saturated solution of barium hydroxide, Ba(OH)2. How would the volume of hydrochloric acid used in the titra
  72. June 2018, AS Component 1, Q11(e) (2 marks): The student did not label the solutions of calcium hydroxide and barium hydroxide. Describe a test he could use to determine which solution is which. Include th
  73. June 2017, Component 1, Q15(b)(i) (1 mark): Explain why the solid calcium phosphate precipitate must be heated to constant mass. [1]
  74. June 2017, Component 3, Q2(a) (1 mark): Metal X appears not to react with cold water but reacts rapidly with steam. Identify metal X and give the equation for its reaction with steam. [1] Metal X
  75. June 2017, Component 3, Q2(b)(i) (3 marks): When 2.27 g of metal Y are added to 600 cm3 of water, the concentration of the metal hydroxide solution formed on complete reaction is 0.0431 mol dm−3. [3] Iden
  76. June 2017, Component 3, Q2(b)(ii) (4 marks): When 200 cm3 of the 0.0431 mol dm−3 solution of Y(OH)2 formed in part (i) are added to excess sodium carbonate solution, YCO3 is precipitated as a white solid a
  77. June 2017, Component 3, Q2(c) (6 marks): Carbonates of Group 2 decompose on heating according to the following general equation. ZCO3(s) ZO(s) + CO2(g) Give the trend in thermal stability of the carbon
  78. June 2017, Component 3, Q2(d) (3 marks): Give a precipitation reaction which can be used as a test for Ba2+(aq) ions, which would not give a positive result for Mg2+(aq) ions. Your answer should includ
  79. June 2017, AS Component 1, Q5 (1 mark): Calcium carbonate, CaCO3, decomposes significantly at temperatures above 800 °C. Suggest a temperature at which barium carbonate, BaCO3, would decompose signifi
  80. June 2017, AS Component 1, Q9(d) (4 marks): In two separate experiments aqueous chlorine was added to aqueous sodium bromide and aqueous bromine was added to aqueous sodium chloride. In each case an orang
  81. June 2017, AS Component 1, Q12(b)(i) (1 mark): From these observations name one ion present in solution W. [1]
  82. June 2017, AS Component 1, Q12(b)(ii) (1 mark): The observations allowed Caroline to eliminate some metal ions as being present in W. Suggest one metal ion that she eliminated. [1]
  83. June 2017, AS Component 1, Q12(b)(iii) (1 mark): Write the ionic equation for the reaction between aqueous solutions of barium chloride and W. Include state symbols. [1]
  84. June 2016, AS Component 1, Q11(a) (3 marks): Suggest the identity of metal X and metal Y. Explain your reasoning. [3] X is Y is Explanation
  85. June 2016, AS Component 1, Q11(b)(i) (1 mark): Using the symbol X for the metal, write the ionic equation for the reaction of the salt of X with dilute sulfuric acid. Include state symbols. [1]
  86. June 2016, AS Component 1, Q11(b)(ii) (1 mark): Using the symbol Y for the metal, write the ionic equation for the reaction of the salt of Y with aqueous sodium hydroxide. Include state symbols. [1]
  87. June 2016, AS Component 1, Q11(c)(i) (3 marks): Explain what happens when aqueous chlorine is added to solutions of the salts of X and Y. [3] You should include: • the identity of the orange/brown product • t
  88. June 2016, AS Component 1, Q11(c)(ii) (2 marks): Describe a test that you could carry out on the salt solutions to confirm the identity of this anion. Include the observation expected in the test. [2]
  89. June 2016, AS Component 1, Q12(b) (2 marks): A white solid is known to be either a magnesium or a potassium compound. Describe how you could carry out a flame test to identify the metal ion present. You sh
  90. June 2016, AS Component 1, Q13(c)(i) (2 marks): State how the precipitate was treated in order to obtain the mass of the silver chloride. Explain why the precipitate was treated in this way. [2]
  91. June 2016, AS Component 1, Q13(c)(ii) (1 mark): Write the ionic equation for the formation of this precipitate. Include state symbols. [1]

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