Question

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Q
U E S T I
Why should a magnesium ribbon be cleaned before burning in air
be allowing chemical reactions​

Answer 1

Explanation:

we should clean the magnesium ribbon before burning because it quickly comes contact with oxygen and form magnesium oxide so while rubbing the oxide layer removed

Answer 2

Answer :

Magnesium is a highly reactive metal. When exposed to air for a long time it gets coated with the layer of oxide which is physically and mentally stable and therefore, partly masks the reactivity of magnesium. The oxide coating does not burn when a flame is brought in contact with the metal. Therefore, the surface should be cleaned, with a sandpaper before burning the magnesium ribbon in air.