why should a magnesium ribbon be cleaned before burning in air.(i)Write the balanced chemical equation with state symbol for the following reaction.When aqueous solution of barium chloride reacts with an aqueous solution of ammonium sulphate.(ii)During electrolysis of water what is the ratio of the two gases obtained.Name the gases
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1.for removing the oxide layer
2. 2mg(s)+ o2(g)=2mgo(s).
3.ammonium chloride and barium sulphate is formed where barium sulphate is a precipitate.
4. 2:1,hydrogen and oxygen.
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