Question

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

Answer 1

Answer:

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

Answer 2

Answer:

It is so because magnesium is very reactive metal and when it reacts with oxygen present in the air its formula of magnesium oxide and their of magnesium oxide is so stable that it prevents the for the reaction of magnesium with oxygen so mission ribbon should be cleaned before burning in air with the centre