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Exam-style practice

Redox practice questions

Practise mixed syllabus-aligned questions for Redox. Aligned to Cambridge IGCSE Chemistry.

Practice questions

Question 20 of 26

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Paper 4 structured question: Redox

Paper 4Theory (Extended)2 marks

Description

Color Changes in Redox Reactions

In a redox reaction involving potassium iodide, the solution turns brown, indicating the formation of iodine. In another reaction, the addition of acidified potassium manganate(VII) leads to a color change from purple to colorless.

  1. a

    Describe the significance of the color change observed with potassium iodide in redox reactions.

    Aim for approximately 2 distinct marking points.

    [2]
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