Syllabus Edition

First teaching 2023

First exams 2025

|

Bonding & Structure (CIE AS Chemistry)

Exam Questions

2 hours18 questions
11 mark

Which solid has a giant covalent lattice structure?

  • Calcium fluoride

  • Nickel

  • Silicon (IV) dioxide

  • Sulfur

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21 mark

The table shows the physical properties of four substances.

Which substance has a giant ionic structure? 

 

melting point

/

boiling point

/

electrical conductivity of solid

electrical conductivity of liquid

electrical conductivity of aqueous solution

1

-119

39

poor

poor

insoluble

2

-115

-85

poor

poor

good

3

993

1695

poor

good

good

4

1610

2230

poor

poor

insoluble

  • 1, 2 and 3

  • 1 and 2

  • 1 and 3

  • 3 only

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31 mark

Three substances, R, S and T, have physical properties as shown.


Substance


Melting / oC


Boiling / oC

Electrical conductivity of liquid

R

772

1407

Yes

S

114

183

No

T

1610

2205

No

What type of lattice could each substance have?

 

R

S

T

A

Giant molecular

Simple molecular

Ionic

B

Ionic

Giant molecular

Simple molecular

C

Ionic

Simple molecular

Giant molecular

D

Simple molecular

Ionic

Giant molecular

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    41 mark

    Which diagram represents part of a giant covalent lattice structure?

    1-4-diagram-q7e

    • 1, 2 and 3

    • 1 and 2

    • 1 and 3

    • 3 only

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    11 mark

    Three substances, X, Y and Z, have physical properties as shown.


    Substance


    Melting / oC


    Boiling / oC

    Electrical conductivity

    of solid

    of liquid

    X

    801

    1413

    Poor

    Good

    Y

    2852

    3600

    Poor

    Good

    Z

    3550

    4827

    Good

    Not known

    What could be the identities of X, Y and Z?

     

    X

    Y

    Z

    A

    CaF

    KCl

    Cu

    B

    NaCl

    MgO

    C (graphite)

    C

    NaBr

    CaO

    C (diamond)

    D

    NaBr

    BaO

    SiO2

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      21 mark

      When can sodium chloride conduct electricity?

        Solid Molten Aqueous
      A X
      B X
      C X
      D X X

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        31 mark

        Which chemical has the highest melting point?

        • Sulfur

        • Calcium oxide

        • Lithium

        • Sodium fluoride

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        11 mark

        Which compounds have an ionic lattice structure in the solid state?

         

        Silicon dioxide

        Ammonium sulfate

        Potassium iodide

        A

        B

        C

        D

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          21 mark

          What properties best describe the structure and bonding present in hydrogen fluoride?

           

          Localised covalent bonds

          High solubility in polar solvents

          H-F bond has the lowest bond enthalpy out of Group 7 hydrides

          Highest boiling point out of Group 7 hydrides

          A

          B

          C

          D

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            31 mark

            What is the correct order for the melting points of the following metal oxides?

            • Na2O > MgO > CaO

            • MgO > CaO > Na2O

            • MgO > Na2O > CaO

            • Na2O > CaO > MgO

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