ReasoningModerate1 mark
5(iv)
Study the diagram, which shows the Brown Ring Test and answer the questions given below:
Why is freshly prepared iron[II] sulphate used in the test?
Topic: Practical tests and observations
Previous-year question practice database
Answer
Exam answer
Fresh FeSO₄ is used because Fe²⁺ is readily oxidised to Fe³⁺ on standing; the brown-ring test requires Fe²⁺.
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