1.

Why should a magnesium ribbon be cleaned before burnig in air?

Answer» It is cleaned to remove the particles that are corroded in it.If the particles are not cleaned then it will not react in air
When magnesium ribbon reats with oxygen then it forms a layer in its surface thats why magnesium ribbon is cleaned before burning
It is clean to remove the protective layer of Mgo
To remove layervif MgO


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