O-LevelChemistryAcids, Bases & Salts5070/12 · May/June 2021 · Q41 Mark

An aqueous solution of J is a colourless solution that contains cations and chloride ions. Separate samples of the solution give a white precipitate with a few drops of aqueous sodium hydroxide and with a few drops of aqueous ammonia. Which statement about J is correct?

AThe cation in J must be Al3+.

BThe cation in J must be Fe2+.

CWhen dilute nitric acid and aqueous barium nitrate are added to an aqueous solution of J, a white precipitate is formed.

DWhen dilute nitric acid and aqueous silver nitrate are added to an aqueous solution of J, a white precipitate is formed.

✓ Correct answer

D: When dilute nitric acid and aqueous silver nitrate are added to an aqueous solution of J, a white precipitate is formed.

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Topic: Acids, Bases & Salts, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2021 Paper 1 Variant 2, question 4.

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