Question

Why should magnesium ribbon be cleaned beforeburning in air??D?

Answer 1

Answer:

Explanation:Magnesium ribbon reacts with the oxygen in air to form MgO or magnesium oxide on the ribbon . So it is cleaned by running with a sand paper to clean its surface before burning.

Hope it helps!

Answer 2

Answer:

It is so because magnesium is a very reactive metal and it reacts with oxygen present in the air and forms of magnesium oxide on it and the layer of magnesium oxide is highly stable and does it prevents the for the reaction of magnesium with oxygen so that it is necessary that the magnesium ribbon be cleaned before burning in air or in the presence of the oxygen so that the underlying metals can also be exposed to the air....