Why should a magnesium ribbon cleaned before burning in air?

1.	Why should a magnesium ribbon cleaned before burning in air?
Answer» Because magnesium ribbon develops a layer of magnesium oxide when it reacts with oxygen present in air To remove layer of mgo it is done soo the reaction can done properly Because magnesium ribbon reacts with oxygen to form a protective and unreactive layer of magnesium oxide which prevents it from burning. To remove the protective layer of magnesium oxide of magnesium ribbon Because magnesium ribbon reacts with oxygen to form a protective and unreactive layer of magnesium oxide which prevents it from burning.

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