Question

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 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

Hlew,

Here's your answer....

magnesium is very reactive metal when it keep in air it react with oxygen and form a layer of magnesium oxide on magnesium ribbon which is unable to burn .

so, we clean magnesium ribbon before burning to remove this oxide

Thanks.

Sorry baby 'wink'