O-LevelChemistryAcids, Bases & Salts5070/11 · Oct/Nov 2012 · Q31 Mark

Substance Q is a soluble salt. An aqueous solution of Q is tested as shown. Test: warm Q with aqueous sodium hydroxide, Observation: alkaline gas given off, no precipitate formed. Test: to Q add dilute nitric acid and barium nitrate solution, Observation: white precipitate forms. What is Q?

Aammonium chloride

Bammonium sulfate

Czinc chloride

Dzinc sulfate

✓ Correct answer

B: ammonium sulfate

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Topic: Acids, Bases & Salts, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2012 Paper 1 Variant 1, question 3.

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