Chapter 1: Chemical reactions and equations

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Q
Chemical reactions and equations

Question:

Why should a magnesium ribbon be cleaned before burning in air?

Answer:

Magnesium is a very reactive element and it reacts rapidly with oxygen gas to form a white layer of magnesium oxide. This oxide layer will not burn and prevent the burning of magnesium ribbon. That is why magnesium ribbon is always cleaned with sandpaper before burning in the air.


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