An unknown green solution is heated with a piece of aluminium foil and sodium hydroxide solution
(i) The gas produced turns damp red litmus paper blue. Name the gas evolved.
Ammonia gas
(ii) This is a confirmatory test for an anion. Name this anion.
Nitrates.
(iii) Give a possible cation which gives the green solution.
Iron(II) ions (Fe 2+)
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