Question

1.
Why should a magnesium ribbon be cleaned before burning in air?​

Answer 1

Answer:

Magnesium ribbon must be cleaned before burning in air so that the layer ofmagnesium oxide (which is formed due to reaction ofmagnesium with air) can be removed in order to get the desired chemical reaction.

Answer 2

Explanation:

magnesium ribbon when come in contact with air it get a layer of magnesium hidrooxide . so we have to clean it before burning in air