Question

Why should a magnesium ribbon cleaned before burning in the air?( Write 5 points)
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Answer 1

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Magnesium ribbon must be cleaned before burning in air because the layer of magnesium oxide (which is formed due to reaction of magnesium with air) can be removed in order to get the desired chemical reaction.

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Answer 2

Magnesium ribbon should be cleaned before burning because since it is reactive element so it reacts with oxygen present in the air and forms a layer of oxide over its surface due to which it won't catch fire. So, to burn the Magnesium ribbon it is important to clean it with the help of sand paper.