Question

What is oxidized and reduced in mg + o2 gives to mgo?

Answer 1

The reaction between magnesium metal and oxygen to form magnesium oxide involves the oxidation of magnesium.

The reaction between magnesium oxide and carbon at 2000C to form magnesium metal and carbon monoxide is an example of the reduction of magnesium oxide to magnesium metal.

Answer 2

Answer: Mg is oxidized and $O_2$ is reduced.

Explanation:

$2Mg+O_2\rightarrow 2MgO$

Oxidation-reduction reaction or redox reaction is defined as the reaction in which oxidation and reduction reactions occur simultaneously.

Oxidation reaction is defined as the reaction in which a substance looses its electrons. The oxidation state of the substance increases.

$Mg\rightarrow Mg^{2+}+2e^-$

Reduction reaction is defined as the reaction in which a substance gains electrons. The oxidation state of the substance gets reduced.

$\frac{1}{2}O_2+2e^-\rightarrow O^{2-}$