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Cambridge IGCSE Combined Science practice

Paper 4 structured question: Terminology

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Terminology

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Paper 4Theory (Extended)4 marks

The study of homologous series is important in organic chemistry.

Description

Trends in Physical Properties

In a homologous series, as the number of carbon atoms increases, the boiling point and melting point typically increase due to stronger intermolecular forces.

  1. a

    Discuss the trend in boiling points within a homologous series.

    Aim for approximately 4 distinct marking points.

    [4]

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Paper 4 structured question: Terminology

Paper 4Theory (Extended)2 marks

Description

Homologous Series Characteristics

A homologous series is defined by having the same general formula and showing a trend in physical properties such as boiling points and melting points as the molecular size increases.

  1. a

    Explain the significance of having the same general formula in a homologous series.

    Aim for approximately 2 distinct marking points.

    [2]