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Cambridge IGCSE Chemistry practice

Paper 4 structured question: Alkanes

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Alkanes

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Paper 4Theory (Extended)3 marks

The substitution reaction of alkanes with chlorine is a key process in organic chemistry.

Description

Substitution Reaction of Alkanes

In the presence of ultraviolet light, alkanes react with chlorine to form chlorinated alkanes. This reaction involves the substitution of hydrogen atoms with chlorine atoms, typically resulting in monosubstitution.

  1. a

    Describe the process of monosubstitution in alkanes when reacted with chlorine.

    Aim for approximately 3 distinct marking points.

    [3]

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Paper 4 structured question: Alkanes

Paper 4Theory (Extended)1 marks

Description

Substitution Reaction of Alkanes

In the presence of ultraviolet light, alkanes react with chlorine to form chlorinated alkanes. This reaction involves the substitution of hydrogen atoms with chlorine atoms, typically resulting in monosubstitution.

  1. a

    State the role of ultraviolet light in this reaction.

    Aim for approximately 1 distinct marking point.

    [1]