Magnesium metal burns in air with dazzling white flame. Mention the type of chemical reaction .
Why should it be cleaned with sand paper before burning?
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it is a combination reaction
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The reaction of magnesium buring in air is a combination reaction.
Magnesium is a reactive metal. In exposure it reacts with oxygen to form a thin layer of magnesium oxide . This layer prevents the further reaction of magnesium in air. To expose this underlying metal, magnesium ribbon is cleaned with sandpaper before burning
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