Question

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

Answer 1

★ Answer:

→ Magnesium ribbon reacts with oxygen present in air to form a protective and inert layer of magnesium oxide on its surface.

→ This layer is unreactive and prevents the ribbon from burning. Hence, it needs to be cleaned with sandpaper before burning in air.

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@Joy

Answer 2

Hiii....

Magnesium must be cleaned before burning in air because magnesium is very much reactive... If left in atmosphere for a long period of time, it reacts with atmospheric oxygen and forms a layer of magnesium oxide on its Surface...

Hence, magnesium ribbon must be cleaned before burning in air...

It is must to clean it in order to get the desired chemical reaction...

And if not cleaned the layer of MgO will interrupt in burning or it would not burn at all.....

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