Why magnissium ribbion should be clean before burning air
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This is because a magnesium ribbon which is kept in open forms a thin whitish layer of magnesium oxide on its outer surface which doesn't easily burn hence for efficient burning this layer has to be scrapped off .
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magnesium ribbon is a very reactive metal.when stored it react with oxygen to form a layer of magnesium oxide on it surface.the magnesium is cleaned before so it can be exposed to air properly
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