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Cambridge IGCSE Chemistry practice

Paper 3 structured question: Simple molecules and covalent bonds

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Simple molecules and covalent bonds

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Paper 3Theory (Core)4 marks

The behavior of simple molecular compounds in different states.

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Electrical Conductivity of Simple Molecular Compounds

Simple molecular compounds do not conduct electricity in solid or liquid states due to the absence of free ions.

  1. a

    Discuss the reasons why simple molecular compounds do not conduct electricity.

    Aim for approximately 4 distinct marking points.

    [4]

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Paper 3 structured question: Simple molecules and covalent bonds

Paper 3Theory (Core)1 marks

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Properties of Simple Molecular Compounds

Simple molecular compounds, such as water and carbon dioxide, are characterized by their low melting and boiling points and poor electrical conductivity.

  1. a

    State one property of simple molecular compounds that affects their melting point.

    Aim for approximately 1 distinct marking point.

    [1]