Chemistry · Oct / Nov 2016 · Paper 12 · Question 11
5070Identification of ions and gases
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
As printed in the paper
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Correct answer: D. zinc
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