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Cambridge IGCSE Combined Science practice

Paper 3 structured question: Extraction of metals

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Extraction of metals

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Paper 3Theory (Core)2 marks

Extraction of Aluminium

Description

Aluminium Extraction Process

Aluminium is extracted from bauxite using electrolysis. The process involves melting aluminium oxide and adding cryolite to reduce the melting point.

  1. a

    Explain the role of cryolite in the extraction of aluminium from bauxite.

    Aim for approximately 2 distinct marking points.

    [2]

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Paper 3 structured question: Extraction of metals

Paper 3Theory (Core)4 marks

Description

Electrolysis in Aluminium Production

The electrolysis of aluminium oxide involves passing an electric current through a molten mixture to separate aluminium from oxygen.

  1. a

    Describe the process of extracting aluminium from bauxite using electrolysis.

    Aim for approximately 4 distinct marking points.

    [4]