Chemistry · Oct / Nov 2020 · Paper 11 · Question 5
5070Identification of ions and gases
Compound X is a crystalline solid at room temperature and pressure. An aqueous solution of X is tested as shown. | test | test result | |---|---| | acidify with dilute nitric acid, then add aqueous barium nitrate | no visible change | | add aqueous ammonia | white precipitate, soluble in excess | What could be the identity of X?
- Aammonium carbonate
- Bsodium sulfate
- Ccalcium nitrate
- Dzinc chloride
As printed in the paper
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Correct answer: D. zinc chloride
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