Question

When magnesium ribbon is exposed to air,it forms a layer of magnesium oxide on its surface.This layer of magnesium oxide,

Answer 1

Magnesium is an 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 the sand paper for removing this layer...., so that the underlying metal can be exposed to air.

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