Properties of Ionic and Covalent Compounds

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Question 1 of 8

1. Question
1 point(s)
Sodium chloride is an ionic solid. Which statement is not correct?
- 1. Ions are formed when atoms lose or gain electrons.
- 2. Ions in sodium chloride are strongly held together.
- 3. Ions with the same charge attract each other.
- 4. Sodium chloride solution can conduct electricity.
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Question 2 of 8

2. Question
1 point(s)
Diamond is extremely hard and does not conduct electricity. Which statement explains these properties?
- 1. It has a lattice of positive carbon ions in a 'sea of electrons'.
- 2. It has delocalised electrons and each carbon atom forms three covalent bonds with other carbon atoms.
- 3. It has no delocalised electrons and each carbon atom forms four covalent bonds with other carbon atoms.
- 4. It has strong ionic bonds between each carbon atom.
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Question 3 of 8

3. Question
1 point(s)
- Solid F is an element.
- Solid G is a compound.
- Neither solid conducts electricity but G conducts electricity when dissolved in water.
These properties suggest that F is ._(1)_ and that G is _(2)_ with _(3)_ bonds.

Which words correctly complete gaps 1, 2 and 3?
- 1. (1) diamond
  (2) AgCl
  (3) covalent
- 2. (1) diamond
  (2) NaCl
  (3) ionic
- 3. (1) graphite
  (2) AgCl
  (3) ionic
- 4. (1) graphite
  (2) NaCl
  (3) covalent
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Question 4 of 8

4. Question
1 point(s)
Two statements about silicon (IV) oxide are given.
1. It is a hard substance.
2. It has a macromolecular structure with strong covalent bonds.
Which is correct?
- 1. Both statements are correct and statement 2 explains statement 1.
- 2. Both statements are correct but statement 2 does not explain statement 1.
- 3. Statement 1 is correct but statement 2 is not correct.
- 4. Statement 2 is correct but statement 1 is not correct.
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Question 5 of 8

5. Question
1 point(s)
Slate has a layered structure and can easily be split into thin sheets. Which diagram shows a structure most like that of slate?
- 1.
- 2.
- 3.
- 4.
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Question 6 of 8

6. Question
1 point(s)
X is a solid at room temperature. X has a high melting point. Solid X conducts electricity. Which diagram shows how the particles are arranged in solid X?
- 1.
- 2.
- 3.
- 4.
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Question 7 of 8

7. Question
1 point(s)
The ‘lead’ in a pencil is made of a mixture of graphite and clay.

When the percentage of graphite is increased, the pencil slides across the paper more easily.
Which statement explains this observation?
- 1. Graphite has a high melting point.
- 2. Graphite is a form of carbon.
- 3. Graphite is a lubricant.
- 4. Graphite is a non-metal.
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Question 8 of 8

8. Question
1 point(s)
Rescuers are drilling through fallen rock in order to rescue some men trapped in a cave. The drill needs lubricating from time to time.
The following statements were made about the materials used for the drill tip and the lubricant and the reasons for their use. Which statements are correct?
- 1. 1. Diamond was used for the drill tip as it does not conduct electricity.
- 2. 2. Diamond was used for the drill tip as it is very hard.
- 3. 3. Graphite was used as the lubricant as it conducts electricity.
- 4. 4. Graphite was used as the lubricant as it is soft and flaky.
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Question 1 of 6

1. Question
1 point(s)
Which particles are present in the structure of metals?
1. positive ions
2. negative ions
3. shared pairs of electrons
4. mobile electrons
- 1. 1 and 2
- 2. 1 and 4
- 3. 2 and 3
- 4. 2 and 4
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Question 2 of 6

2. Question
1 point(s)
Substance P conducts electricity when solid.
Which particles move in solid $P$ so that it can conduct electricity?
1. anions
2. cations
3. electrons
- 1. 1 and 2
- 2. 1 only
- 3. 2 and 3
- 4. 3 only
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Question 3 of 6

3. Question
1 point(s)
Which statement explains why metals are malleable?
- 1. The atoms release electrons to become cations.
- 2. The electrons are free to move.
- 3. The electrons and the cations are attracted to each other.
- 4. The layers of ions can slide over each other.
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Question 4 of 6

4. Question
1 point(s)
Element $X$ is shiny and can be formed into a sheet by hammering.
Which row correctly describes the properties of element $X$ ?

$\begin{array}{|c|c|c|} \hline & \text { conducts electricity } & \text { melts below } 25^{\circ} \mathrm{C} \\ \hline \text { A } & \checkmark & \checkmark \\ \text { B } & \checkmark & ✘ \\ \text { C } & ✘ & \checkmark \\ \text { D } & ✘ & ✘ \\ \hline \end{array}$
- 1. A
- 2. B
- 3. C
- 4. D
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Question 5 of 6

5. Question
1 point(s)
The diagram represents the general structure of a solid Z. What is Z?
- 1. aluminium
- 2. iodine
- 3. silicon dioxide
- 4. sulfur
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Question 6 of 6

6. Question
1 point(s)
Which type of structure and bonding is present in an element that is malleable and conducts electricity?
- 1. covalent molecular
- 2. ionic lattice
- 3. covalent macromolecular
- 4. metallic lattice
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