Question

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

Answer 1

Answer:

ƭɦε ɱαɠɳεรเµɱ ૨เɓɓσɳ รɦσµℓ∂ ɓε ૮ℓεαɳε∂ ɓεƒσ૨ε ɓµ૨ɳเɳɠ เɳ ƭɦε αเ૨ ɓε૮αµรε ƭɦε ℓαყε૨ σƒ ɱαɠɳεรเµɱ σאเ∂ε (ωɦเ૮ɦ เร ƒσ૨ɱε∂ ∂µε ƭσ ƭɦε ૨εα૮ƭเσɳ σƒ ɱαɠɳεรเµɱ ωเƭɦ αเ૨ ) ૮αɳ ɓε ૨εɱσѵε∂ เɳ σ૨∂ε૨ ƭσ ɠεƭ ƭɦε ∂εรเ૨ε∂ ૮ɦεɱเ૮αℓ ૨εα૮ƭเσɳ..

Answer 2

$<bullet><v> Magnesium is a very reactive metal. When stored, it reacts with oxygen to form a layer of magnesium oxide on its surface. This layer of magnesium oxide is quite stable and prevents further reaction of magnesium with oxygen. The magnesium ribbon is cleaned by sand paper for removing this layer so that the underlying metal can be exposed to air.$