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why magnesium ribbons rubbed before burning |
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Answer» They are rubbed with sandpaper to remove the layer of magnesium oxide and for further burning so that it can burn easily. Magnesium gets covered with a layer of magnesium oxide when kept in air for a long time. This layer hinders the burning of magnesium. Hence,it is to be cleaned before burning It is rubbed with sandpaper to remove layer of magnesium oxide which hinders the burning of magnesium ribbion |
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