12 questions · 12 marks · ≈ 12 min
The structures of two solids X and Y are shown below.
What are the correct uses of these structures?
| X | Y | |
|---|---|---|
| A | industrial lubricating | glass cutters |
| B | industrial lubricating | industrial lubricating |
| C | glass cutters | industrial lubricating |
| D | glass cutters | glass cutters |
Choose your answer
Graphite is used extensively as a lubricating material. It is also used in pencils and in the manufacture of electrodes for electrolysis.
Which row describes how graphite can be used in electrolysis?
| property | use | |
|---|---|---|
| A | delocalised electrons | conducts electricity |
| B | delocalised electrons | acts as an insulator |
| C | low melting point | acts as an insulator |
| D | low melting point | conducts electricity |
Choose your answer
Graphite is used to produce electrodes due to its ability to conduct electricity.
What other property does graphite have that makes it useful for this application?
Choose your answer
Graphite is an unreactive substance and doesn’t react with the electrolyte.
Graphite is soft and easy to shape into electrodes.
Graphite has a low melting point due to the weak forces in between the layers.
Graphite dissolves readily in water.
Extended tier only
Which statement correctly describes the bonding in metals?
Choose your answer
A lattice of negative ions in a “sea of electrons”.
A lattice of positive ions in a “sea of electrons”.
A lattice of neutral atoms with delocalised electrons.
A lattice of negative ions with delocalised electrons.
Extended tier only
Which row provides a correct description of the properties of metals?
| melting point | boiling point | conducts electricity | |
|---|---|---|---|
| A | high | low | |
| B | low | high | ✓ |
| C | low | low | |
| D | high | high | ✓ |
Choose your answer
Which of the following statements about graphite and diamond are incorrect?
| 1 | They are allotropes of carbon. |
|---|---|
| 2 | They both conduct electricity. |
| 3 | They form different numbers of bonds within their structures. |
| 4 | They have different uses. |
Choose your answer
2 and 3
2 only
1, 3 and 4
2 and 4
Which statement correctly describes the structure of macromolecules?
Choose your answer
Giant molecular crystal which is held together by weak intermolecular forces.
Giant molecular crystal which is held together by strong ionic bonds.
Giant molecular crystal which is held together by weak metallic bonds.
Giant molecular crystal which is held together by strong covalent bonds.
Which statement about graphite and diamond is not correct?
Choose your answer
Graphite is a good lubricant due to the weak forces in between the layers.
Diamond is used as a drill tip because it is an extremely hard substance.
Graphite has a low melting point due to the weak forces in between the layers.
Diamond is an allotrope of carbon.
Statements 1, 2 and 3 are about diamond and graphite.
1 They have atoms that form three equally strong bonds
2 They each conduct electricity
3 They are both formed from the same element
Which statements are not correct?
Choose your answer
1 only
2 only
1 and 3
1 and 2
Silicon(IV) oxide and phosphorus oxide (P2O5) are oxides of elements in Period 3 of the Periodic Table.
Which row describes the correct properties of these two oxides?
| nature of the oxides | type of bonding | melting point of silicon(IV) oxide | melting point of phosphorus(V) oxide | |
|---|---|---|---|---|
| A | acidic | covalent | high | low |
| B | acidic | covalent | low | low |
| C | basic | ionic | high | low |
| D | basic | ionic | low | low |
Choose your answer
Extended tier only
Metallic bonds are very strong and give metals their properties. Which of the following definitions is correct for a metallic bond?
Choose your answer
A metallic bond is formed by the electrostatic attraction that occurs due to electron transfer between metal atoms.
A metallic bond is formed by the electrostatic attraction between the positive ions and the delocalised electrons.
A metallic bond is formed by the electrostatic attraction that occurs due to the uneven sharing of electrons between metal atoms.
A metallic bond is formed by the intermolecular forces between the positive metal ions and the delocalised electrons.
Extended tier only
Metals are malleable and ductile and can be hammered and pulled into useful shapes.
Which statement correctly explains these properties?
Choose your answer
Layers of atoms in the metal lattice are rigid and held strongly together so they cannot move.
Layers of atoms in a metal can slide over one another and break the attractive forces that hold them together.
Layers of atoms in a metal can slide over one another and new attractive forces are formed between the metal ions and the delocalised electrons.
Layers of atoms in a metal cannot slide over one another and the attractive forces between the metal ions and the delocalised electrons are unbreakable.