In the reaction $3 \mathrm{Mg}+\mathrm{N}_{2} ightarrow \mathrm{Mg}_{3} \mathrm{~N}_{2}$
In the reaction $3 \mathrm{Mg}+\mathrm{N}_{2} ightarrow \mathrm{Mg}_{3} \mathrm{~N}_{2}$
magnesium is reduced
magnesium is oxidized
nitrogen is oxidized
None of these
Solution
In the given reaction, oxidation state of $\mathrm{Mg}$ is changing from 0 to $+2$, while in nitrogen it is changing from 0 to $-3$. So oxidation of $\mathrm{Mg}$ and reduction of nitrogen takes place.
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