Question

why should magnesium ribbon be cleaned before burning in air ?​

Answer 1

Answer :

• Magnesium Ribbon Should be Cleaned Before Burning to remove all the unwanted and protective layer from its surface, so that it can burn easily.

Answer 2

Answer:

magnesium ribbon reacts with carbon dioxide present in the air to form a protective and inert layer of magnesium carbonate. This layer is unreactive and hence, needs to be cleaned with sand paper before burning in air.