Question

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

Answer 1

Answer:

A magnesium ribbon should be cleaned before burning in air because it reacts with oxygen to form magnesium oxide.

Answer 2

Explanation:

Magnesium ribbon is cleaned before burning in air because there are some undesirable accumulation over the surface of the ribbon which doesn't allow ribbon a direct contact with the air. We clean the ribbon and remove those layers from the ribbon so that it's contact with the air is much more and can show proper burning and can form magnesium oxide.

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