Question

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

Answer 1

Explanation:

Magnesium react with oxygen present in air and forms a layer of magnesium oxide on it's surface which creates hurdle during burning.

Hence magnesium ribbon should be cleaned before burning in air.

Answer 2

Answer:

Explanation:

Before burning in air, the magnesium ribbon is cleaned by rubbing with a sand paper. This is done to remove the protective layer of magnesium oxide from the surface of the magnesium ribbon so that it may readily combine with the oxygen in air (on heating).

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