Question: Magnisium powder burns in air to give:
$\mathrm{MgO}$ only
$\mathrm{MgO}$ and $\mathrm{Mg}\left(\mathrm{NO}_{3}\right)_{2}$
$\mathrm{MgO}$ and $\mathrm{Mg}_{3} \mathrm{~N}_{2}$
$\mathrm{Mg}\left(\mathrm{NO}_{3}\right)_{2}$ and $\mathrm{Mg}_{3} \mathrm{~N}_{2}$
Correct Option: , 3
Solution:
$\mathrm{Mg}+\underset{\mathrm{O}_{2} / \mathrm{N}_{2}}{\operatorname{air} \stackrel{\Delta}{\longrightarrow}} \mathrm{MgO}+\mathrm{Mg}_{3} \mathrm{~N}_{2}$
