Answer:
Combustion and redox
Explanation:
Magnesium is burned in the presence of oxygen and form magnesium oxide.
The oxidation -reduction also take place that's why the given reaction is redox.
These reactions are take place by gaining or losing the electrons and oxidation state of elements are changed.
Oxidation:
Oxidation involve the removal of electrons and oxidation state of atom of an element is increased.
Reduction:
Reduction involve the gain of electron and oxidation number is decreased.
Consider the following reactions.
2Mg + Oâ‚‚  →  2MgO Â
the oxidation state of magnesium is changed from 0 to +2 so it get oxidized.
The oxidation state of oxygen is changed from 0 to -2 so it get reduced.
