logo

Exam-style practice

Redox answer explanations

Review worked answers and explanations for Redox. Aligned to Cambridge IGCSE Chemistry.

Answer explanations

Question 20 of 26

Review the answer support, then move sideways through the set.

Showing nearby questions. Use Previous and Next to move through all 26 questions.

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.

    [2]
Next →