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Cambridge IGCSE Combined Science practice

Paper 3 structured question: Chromatography

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Chromatography

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Paper 3Theory (Core)2 marks

Analysis of a colored mixture using chromatography.

Description

Colored Mixture Analysis

A mixture of colored dyes is analyzed using paper chromatography. The results show three distinct spots on the chromatography paper after the experiment.

  1. a

    Describe the expected outcome of the chromatography experiment.

    Aim for approximately 2 distinct marking points.

    [2]

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Paper 3 structured question: Chromatography

Paper 3Theory (Core)3 marks

Description

Ink Chromatography

A student performed paper chromatography on a black ink mixture. They spotted the ink on chromatography paper and placed it in water as the solvent. After some time, they observed several distinct colored spots on the paper.

  1. a

    Explain the process of paper chromatography as demonstrated in the experiment.

    Aim for approximately 3 distinct marking points.

    [3]