Revision NotesExam QuestionsPast Papers
O LevelChemistryCambridgeExam Questions2. Atoms, Elements & Compounds2.6 Giant Covalent Structures

Giant Covalent Structures (Cambridge O Level Chemistry)

Exam Questions

2 hours28 questions

Select a question set to download for
2.6 Giant Covalent Structures

Select an answer set to view for
2.6 Giant Covalent Structures

Easy
Medium
Hard
11 mark

The structures of two solids X and Y are shown below.

q1-2-4-mcq-easy-cie-igcse-che

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

    Did this page help you?

    21 mark

    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

      Did this page help you?

      31 mark

      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?

      • 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.

      Choose your answer

      Did this page help you?

      11 mark

      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.

      • 2 and 3

      • 2 only

      • 1, 3 and 4

      • 2 and 4

      Choose your answer

      Did this page help you?

      21 mark

      Which statement correctly describes the structure of macromolecules?

      • 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.

      Choose your answer

      Did this page help you?

      31 mark

      Which statement about graphite and diamond is not correct?

      • 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.

      Choose your answer

      Did this page help you?

      41 mark

      The following statements describe the structure and properties of silicon(IV) oxide.

      1. Giant covalent structure held together by many strong covalent bonds.
      2. It is a very hard substance.

      Which of the following is correct for statements 1 and 2?

      • Statement 2 is correct but statement 1 is incorrect.

      • Both statements are incorrect.

      • Both are correct and statement 1 explains statement 2.

      • Both are correct and statement 2 explains statement 1.

      Choose your answer

      Did this page help you?

      51 mark

      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 incorrect? 

      • 1 only

      • 2 only

      • 1 and 3 

      • 1 and 2

      Choose your answer

      Did this page help you?

      61 mark

      The diagrams show the structures of two solids, P and Q.

      q7-cie-o-level-chemistry-june-2021-paper-1

      Which row is correct?

       

      has covalent bonding

      conducts electricity

      A

      P only

      P only

      B

      P only

      Q only

      C

      both P and Q

      P only

      D

      both P and Q

      Q only

        Choose your answer

        Did this page help you?

        11 mark

        Which statement correctly describes the arrangement of atoms in silicon dioxide?

        • Each silicon atom is bonded to two oxygen atoms and each oxygen atom is bonded to one silicon atom.

        • Each silicon atom is bonded to four oxygen atoms and each oxygen atom is bonded to two silicon atoms.

        • Each silicon atom is bonded to four oxygen atoms and each oxygen atom is bonded to four silicon atoms.

        • Each silicon atom is bonded to two oxygen atoms and each oxygen atom is bonded to four silicon atoms.

        Choose your answer

        Did this page help you?

        21 mark

        Which of the following statements about silicon(IV) dioxide and diamond are correct?

        1 Silicon(IV) dioxide forms a giant ionic lattice structure.
        2 They are both compounds.
        3 They both have very high melting points.
        4 There are strong covalent bonds in silicon(IV) dioxide.

        • 1 and 3

        • 1 only 2

        • 1, 2 and 4

        • 3 and 4

        Choose your answer

        Did this page help you?

        31 mark

        Which row correctly describes the use of graphite and silicon(IV) dioxide?

          graphite silicon(IV) dioxide
        A electrodes production of plastics
        B electrolyte production of glass
        C electrolyte production of plastics
        D electrodes production of glass

          Choose your answer

          Did this page help you?

          41 mark

          Which row provides a correct description of the structure and properties of silicon(IV) oxide?

            forms an acidic oxide has a giant structure conducts electricity
          A ✓ ✓ cross times
          B ✓ cross times ✓
          C cross times ✓ cross times
          D cross times cross times ✓

            Choose your answer

            Did this page help you?