Question

Why should we clean magnesium ribbon before burning with sand paper

Answer 1

Answer:

Magnesium ribbon is rubbed with the sandpaper before burning is to remove all the impurities which will alter and disturb the reaction with oxygen while burning. Magnesium react with oxygen to form magnesium oxide, which does not burn..

Answer 2

Answer:

because magnesium ribbon on reacting with atmospheric oxygen gets a layering of oxide over it.

Explanation:

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