Question

Why should we clean magnesium ribbon before burning in air

Answer 1

hey brother here is ur answer

Magnesium ribbon must be cleaned before burning in air so that 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.

hope this answer helped u

Answer 2

$hey \: mate \: \\ we \: should \: clean \: magnesium \: ribbom \: becuse \: it \: reacts \: with \: o2 \: and \: forms \: mgo \: which \: will \: prevent \: further \: rxn$