Intermolecular forces, electronegativity and bond properties: past paper questions

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• Question 5May/June 2026, paper 12Multiple choice1 mark

  In which substance, when in pure liquid form, are instantaneous dipole-induced dipole forces the only intermolecular force in the substance?

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• Question 1May/June 2025, paper 12Multiple choice1 mark

  Consider the following statements. 1 Silicon dioxide has a higher melting point than sulfur dioxide. 2 Ammonia has a higher boiling point than phosphine, $\mathrm{P}{\mathrm{H}}_3$.

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• Question 6Oct/Nov 2024, paper 12Multiple choice1 mark

  Why does $\mathrm{I}\mathrm{C}\mathrm{l}$ have a higher boiling point than ${\mathrm{B}\mathrm{r}}_2$?

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• Question 8Oct/Nov 2023, paper 11Multiple choice1 mark

  Nitrogen, ${\mathrm{N}}_2$, and carbon monoxide, $\mathrm{C}\mathrm{O}$, both have $M_r=28$. The boiling point of ${\mathrm{N}}_2$ is $77\text{ K}$. The boiling point of $\mathrm{C}\mathrm{O}$ is $82\text{ K}$.

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• Question 22May/June 2026, paper 12Multiple choice1 mark

  The volatility of the halogens decreases down the group. What is the explanation for this trend?

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• Question 10May/June 2025, paper 12Multiple choice1 mark

  The average intermolecular forces in water are much stronger than the average intermolecular forces in steam. The average intermolecular forces in ice are slightly stronger than the average intermolecular forces in water.

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• Question 8Oct/Nov 2024, paper 12Multiple choice1 mark

  Which statement about the properties associated with the different types of bonding involved is correct?

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• Question 24Oct/Nov 2023, paper 12Multiple choice1 mark

  Iodine has a higher melting point than chlorine. What is the reason for this?

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• Question 1May/June 2026, paper 21Structured17 marksHas a diagram

  Complete the dot-and-cross diagram in Figure 1.1 to show the arrangement of outer shell electrons in a molecule of ${\mathrm{S}\mathrm{F}}_6$.

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• Question 17May/June 2025, paper 12Multiple choice1 mark

  Why do the halogens become less volatile as Group 17 is descended?

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• Question 2Oct/Nov 2024, paper 22Structured15 marksHas a diagram

  Oxygen is a Group 16 element. Write equations for the following reactions.

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• Question 8May/June 2024, paper 11Multiple choice1 markHas a diagram

  The graph shows the boiling points of the hydrogen compounds of Group 16 elements. Which statement correctly explains why water does not fit the trend of the other compounds?

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• Question 22Oct/Nov 2023, paper 13Multiple choice1 mark

  In this question, Q represents an atom of chlorine, bromine or iodine. Which explanation for the variation in volatility down Group 17 is correct?

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• Question 8May/June 2024, paper 12Multiple choice1 mark

  Consider the following four compounds.

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• Question 22May/June 2023, paper 11Multiple choice1 markHas a diagram

  The boiling points of $\mathrm{B}{\mathrm{r}}_2$, $\mathrm{I}\mathrm{C}\mathrm{l}$ and $\mathrm{I}\mathrm{B}\mathrm{r}$ are given in the table.

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• Question 9May/June 2023, paper 13Multiple choice1 mark

  Which statement explains why buckminsterfullerene has a lower melting point than graphite?

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• Question 1May/June 2023, paper 22Structured12 marks

  The melting points of some solids are shown in Table 1.1. Table 1.1 | solid | melting point/K | | :--- | :--- | | magnesium | 923 | | phosphorus | 317 | | sodium chloride | 1074 | | sulfur | 392 | State the type of bonding present in magnesium and in sodium chloride.

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