Q3 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.
Answer: Ammonia Gas
(ii) This is a confirmatory test for an anion. Name this anion.
Answer: Nitrate ( NO2+)
(iii) Give a possible cation which gives the green solution.
Answer: Iron(II) ( Fe2+).