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O-LevelChemistryAcids, Bases & Salts5070/12 · Oct/Nov 2016 · Q111 Mark

Aqueous sodium hydroxide is added to a sample of a colourless solution. Aqueous ammonia is added to a separate sample of the colourless solution. In both cases a white precipitate forms which is soluble in excess reagent. Which positive ion is present in the solution?

Aaluminium
Bcalcium
Ccopper(II)
Dzinc

✓ Correct answer

D: zinc

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About this question

Topic
Acids, Bases & Salts, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source
O-Level Chemistry, Oct/Nov 2016 Paper 1 Variant 2, question 11.

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