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CAIE IGCSE Chemistry 2.6 Giant covalent structures Question Bank

Practise comparing diamond, graphite and silicon(IV) oxide using structure diagrams, bonding descriptions and property data.

Syllabus
2026–2028
Course
Chemistry 0620

Exam points

  • link high melting points in diamond, graphite and silicon(IV) oxide to giant covalent bonding
  • explain graphite conductivity from mobile electrons, not ions or metallic bonding
  • interpret tables or diagrams to distinguish graphite, diamond and silicon(IV) oxide

Covered syllabus points

2.6.1—Giant covalent structures of graphite2.6.2—Relate the structures and bonding of2.6.3—Giant covalent structure of2.6.4—Similarity in properties between

2.6 Giant covalent structures question 1

[Maximum number: 1]

Carbon is an element which exists in different forms.

Name two forms of the element carbon that have giant covalent structures. and

2.6 Giant covalent structures question 2

[Maximum number: 1]

Graphite has a giant covalent structure.
Which statements about graphite are correct?
1 Carbon atoms form four covalent bonds with neighbouring atoms.
2 There are delocalised electrons between layers of carbon atoms.
3 Graphite is a useful lubricant.
4 Graphite is a good conductor of electricity.

A

1 and 2

B

1, 3 and 4

C

2, 3 and 4

D

3 and 4 only

2.6 Giant covalent structures question 3

[Maximum number: 1]

The symbols of the elements of Period 3 of the Periodic Table are shown.

Table for Question 2.6 Giant covalent structures question 3 — CAIE IGCSE Chemistry

Answer the following questions about these elements.
Each element may be used once, more than once or not at all.
Write the symbol of an element which:

forms an oxide with a macromolecular structure

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