Chemistry 0620 · IGCSE
Giant covalent structures
94 practice questions on Giant covalent structures, with worked solutions and instant marking.
Carbon dioxide and silicon(IV) oxide are oxides belonging to Group IV elements.
Feb/March 2016
Diamond and silicon(IV) oxide each have giant structures. Which statements are correct?
Feb/March 2017
Which of the following statements about graphite and diamond is correct?
Feb/March 2018
Three claims about diamond, graphite and silicon(IV) oxide are given. Which claims are correct?
Feb/March 2018
Which one of the following pairs of statements about diamond and graphite is correct?
Feb/March 2019
Which statement concerning copper, diamond and silicon(IV) oxide is correct?
Feb/March 2019
Which row gives the structure and one use of diamond?
Feb/March 2020
Which diagram shows the structure of silicon(IV) oxide?
Feb/March 2021
Which statement about graphite accounts for its use as an electrode?
Feb/March 2023
Which statement concerning graphite accounts for its use as an electrode?
Feb/March 2023
Which statement gives the reason that graphite is used as a lubricant?
Feb/March 2024
The arrangements of diamond and graphite are shown. Which statement about diamond and graphite is correct?
Feb/March 2024
Which option best describes the properties of graphite?
Feb/March 2025
Diamond and graphite are macromolecular substances. Which statement concerning diamond and graphite is incorrect?
May/June 2016
Two statements about diamond are provided. 1. Diamond has a giant three-dimensional covalent structure made up of carbon atoms. 2. Diamond is among the hardest substances known. Which statement is correct?
May/June 2016
The structures of diamond and graphite are shown. Which statement about diamond and graphite is incorrect?
May/June 2016
Diamond is very hard and is a poor conductor of electricity. Which statement accounts for these properties?
May/June 2017
Graphite and diamond are both allotropes of the element carbon. Which row gives the number of other carbon atoms to which each carbon atom is covalently bonded in graphite and diamond?
May/June 2017
Diamond is very hard and is a non-conductor of electricity. Which statement accounts for these properties?
May/June 2017
Graphite and diamond are both allotropes of the element carbon. Which row indicates the number of other carbon atoms that each carbon atom is covalently bonded to in graphite and in diamond?
May/June 2017
Carbon and silicon are elements in Group IV of the Periodic Table, and each occurs in more than one isotope.
May/June 2017
A pencil’s ‘lead’ consists of a blend of graphite and clay. As the proportion of graphite is raised, the pencil moves over the paper with less resistance. Which statement accounts for this result?
May/June 2018
The ‘lead’ inside a pencil is a blend of graphite and clay. If the proportion of graphite is raised, the pencil moves over the paper more smoothly. Which statement accounts for this observation?
May/June 2018
The 'lead' inside a pencil is a blend of graphite and clay. As the proportion of graphite is increased, the pencil moves over the paper more readily. Which statement explains this observation?
May/June 2018
The ‘lead’ inside a pencil consists of a mixture of graphite and clay. As the percentage of graphite is increased, the pencil moves across the paper more easily. Which statement accounts for this observation?
May/June 2018
How many silicon atoms are attached to each oxygen atom in a crystal of silicon(IV) oxide?
May/June 2018
Diamond and graphite each have giant covalent structures consisting of carbon atoms. Which statement is used to describe graphite?
May/June 2019
Which statement accounts for why graphite is used as a lubricant?
May/June 2019
Which of the following statements about diamond is correct?
May/June 2019
Silicon has the same structure as diamond. Which of the following statements about silicon is correct?
May/June 2021
Which statement gives the reason graphite can be used as a lubricant?
May/June 2022
Which statement gives the properties of both diamond and silicon(IV) oxide?
May/June 2022
This question concerns Group IV elements and the compounds they form.
May/June 2022
Which substance is said to have a giant covalent structure?
May/June 2023
Which type of structure is silicon(IV) oxide most similar to?
May/June 2023
Which row gives the properties of silicon(IV) oxide?
May/June 2023
Which substance is characterised by a giant covalent structure?
May/June 2024
Which statement about diamond is correct?
May/June 2024
The diagram represents how carbon atoms are arranged in a giant covalent structure. Which row identifies the substance and states a use for it?
May/June 2024
The structures of three substances are shown. Which of the substances are hard and melt at a high temperature?
May/June 2024
Silicon(IV) oxide is a compound with covalent bonding. Which statements are correct?
May/June 2024
Table 3.1 shows some properties of graphite, oxygen and carbon monoxide.
May/June 2024
At room temperature and pressure, which substance contains a giant covalent structure?
May/June 2025
Which substance is characterised by a giant covalent structure?
May/June 2025
Which statements about graphite are true?
May/June 2025
Which statement about silicon(IV) oxide is true?
May/June 2025
Which of the following statements about silicon(IV) oxide, $\text{SiO}_2$, is correct?
May/June 2025
The substances listed below are shown: aluminium oxide, calcium oxide, chlorine, ethanol, graphite, nitrogen, oxygen, propane, propene, silicon(IV) oxide Use the list of substances to answer the questions. Each substance can be chosen once, chosen more than once, or not chosen at all. State which of the substances:
May/June 2025
The diagrams illustrate the structures of two different forms of the same element. What makes T suitable for use in cutting tools and U suitable for use as a lubricant?
Oct/Nov 2016
Which pair of statements about diamond and graphite is correct?
Oct/Nov 2016
Boron nitride is a compound made from the elements boron and nitrogen. Its structure is similar to that of diamond. What property is boron nitride likely to have?
Oct/Nov 2016
Substances that have giant covalent structures may be used as lubricants and also as cutting tools for hard materials. The diagram illustrates the arrangement of atoms in two giant covalent substances, X and Y. Which statement is correct?
Oct/Nov 2017
Which statement accounts for why graphite is used as a lubricant?
Oct/Nov 2017
Diagrams X, Y and Z show part of a polymer and two giant covalent structures. Which of X, Y or Z could serve as a cutting tool, and which of X, Y or Z could be used to lower friction?
Oct/Nov 2017
Two statements about silicon(IV) oxide are provided. 1. It is a hard material. 2. It has a macromolecular structure with strong covalent bonds. Which statement is correct?
Oct/Nov 2017
Which row gives the description of silicon(IV) oxide?
Oct/Nov 2017
Graphite is one allotrope of carbon. Why is graphite suitable for use as a lubricant?
Oct/Nov 2019
Graphite is a type of carbon. Why is graphite suitable for use as a lubricant?
Oct/Nov 2019
Graphite is a form of carbon. What property allows graphite to be used as a lubricant?
Oct/Nov 2019
In what ways are the structures of diamond and silicon(IV) oxide similar?
Oct/Nov 2019
Which statement about the structure and properties of silicon(IV) oxide is incorrect?
Oct/Nov 2019
Silicon(IV) oxide is a compound with covalent bonding. Which of the following statements are correct?
Oct/Nov 2019
What statement explains why graphite is used as a lubricant?
Oct/Nov 2020
Which statement accounts for graphite being used as a lubricant?
Oct/Nov 2020
Which statement accounts for the use of graphite as a lubricant?
Oct/Nov 2020
Which statement accounts for graphite being used as a lubricant?
Oct/Nov 2020
Which of the following statements about silicon dioxide, $\text{SiO}_2$, is correct?
Oct/Nov 2020
Which statement best explains the reason graphite is used as a lubricant?
Oct/Nov 2020
Which statement best explains why graphite is chosen as a lubricant?
Oct/Nov 2020
Which substance is classified as a macromolecule?
Oct/Nov 2021
Some features of diamond are listed. Which of these features are also found in silicon(IV) oxide?
Oct/Nov 2021
Which substance would be described as a macromolecule?
Oct/Nov 2021
The diagram illustrates part of the structures of sodium bromide and graphite at room temperature and pressure.
Oct/Nov 2021
Which line describes the bonding in graphite and one use of graphite?
Oct/Nov 2022
Which statement accounts for the use of diamond in cutting tools?
Oct/Nov 2022
Which row correctly describes the structures and uses of diamond and graphite?
Oct/Nov 2022
Which substance has a structure that is similar to silicon(IV) oxide?
Oct/Nov 2022
Which row correctly gives the structures and uses of diamond and graphite?
Oct/Nov 2022
Diamond and graphite are two different solid allotropes of carbon. In diamond and graphite, the carbon atoms are bonded together in different arrangements.
Oct/Nov 2022
Which application of graphite depends on the carbon-atom layers being able to move over one another?
Oct/Nov 2023
Various allotropes of an element G are used as lubricants and in cutting tools. What is the structure of G?
Oct/Nov 2023
Which row identifies the structure of graphite and one use for it?
Oct/Nov 2023
Graphite possesses a giant covalent structure. Which of these statements about graphite are correct?
Oct/Nov 2023
Which row correctly shows the properties of both diamond and silicon(IV) oxide?
Oct/Nov 2023
Which row shows the structure and one use of diamond?
Oct/Nov 2024
Which statements about the structure and bonding in diamond are right?
Oct/Nov 2024
Which row shows a property and an explanation of that property for both diamond and silicon(IV) oxide?
Oct/Nov 2024
Diamond and graphite both consist of giant covalent structures made from carbon atoms. Which statement best describes graphite?
Oct/Nov 2024
Which of the following statements about graphite and diamond is correct?
Oct/Nov 2025
Diamond is exceptionally hard and does not allow electricity to pass through it. Which statement explains these properties?
Oct/Nov 2025
Boron nitride is a compound made from the elements boron and nitrogen. Its structure is similar to that of diamond. Which property is boron nitride likely to have?
Oct/Nov 2025
Substances with giant covalent structures can serve as lubricants and also as cutting tools for hard materials. The diagrams illustrate the atomic arrangement in two giant covalent substances, P and Q. Which statement is correct?
Oct/Nov 2025
Graphite and diamond are both forms of the element carbon. Which row shows how many other carbon atoms each carbon atom is covalently bonded to in graphite and diamond?
Oct/Nov 2025
A team of rescuers is boring through collapsed rock to free people trapped inside a cave. The drill has to be lubricated occasionally. Four claims are given about the materials chosen for the drill tip and the lubricant, to justify why they are used. 1. Diamond is used for the drill tip because it does not conduct electricity. 2. Diamond is used for the drill tip because it is very hard. 3. Graphite is used as the lubricant because it conducts electricity. 4. Graphite is used as the lubricant because it is soft and slippery. Which statements are correct?
Oct/Nov 2025