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Cambridge IGCSE Chemistry practice

Paper 3 structured question: Formulae, functional groups and terminology

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Formulae, functional groups and terminology

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Paper 3Theory (Core)1 marks

Understanding the properties of homologous series.

Description

Homologous Series

A homologous series consists of compounds that share the same functional group and exhibit similar chemical properties. For example, the alkanes are a homologous series of hydrocarbons.

  1. a

    State the definition of a homologous series.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 3 structured question: Formulae, functional groups and terminology

Paper 3Theory (Core)3 marks

Description

Properties of Homologous Series

Consider the homologous series of alcohols. Each alcohol has a hydroxyl (-OH) functional group and the general formula C_nH_(2n+1)OH.

  1. a

    Explain why compounds in a homologous series have similar chemical properties.

    Aim for approximately 3 distinct marking points.

    [3]