Question

magnesium ribbon is cleaned before burning to remove?

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Answer 1

Answer:

There is a dust layer formed on magnesium ribbon. Before burning, we must remove this layer of dust so that the magnesium ribbon gets in contact with the oxygen to burn.

Formula: Mg + O2 = MgO.

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Answer 2

Answer :

Magnesium is a highly reactive metal. When exposed to air for a long time it gets coated with the layer of oxide which is physically and mentally stable and therefore, partly masks the reactivity of magnesium. The oxide coating does not burn when a flame is brought in contact with the metal. Therefore, the surface should be cleaned, with a sandpaper before burning the magnesium ribbon in air.