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Study the diagram, which shows the Brown Ring Test and answer the questions given below:

Study the diagram, which shows the Brown Ring Test and answer the questions. Which ion is determined by Brown Ring Test? Why is freshly prepared iron[II] sulphate used in the test? Name the substance Z. ICSE 2022 Chemistry Solved Question Paper.

(a) Which ion is determined by Brown Ring Test?

(b) Why is freshly prepared iron[II] sulphate used in the test?

(c) Name the substance Z.

Practical Chemistry

ICSE 2022

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Answer

(a) Nitrate ion [NO31-]

(b) As iron [II] sulphate on exposure to the atmosphere is oxidised to iron [III] sulphate and the test will not answer with iron [III] sulphate, hence, freshly prepared iron[II] sulphate used in the test.

(c) Concentrated Sulphuric Acid.

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