Magnisium powder burns in air to give:

Question:

Magnisium powder burns in air to give:

  1. $\mathrm{MgO}$ only

  2. $\mathrm{MgO}$ and $\mathrm{Mg}\left(\mathrm{NO}_{3}\right)_{2}$

  3. $\mathrm{MgO}$ and $\mathrm{Mg}_{3} \mathrm{~N}_{2}$

  4. $\mathrm{Mg}\left(\mathrm{NO}_{3}\right)_{2}$ and $\mathrm{Mg}_{3} \mathrm{~N}_{2}$

Correct Option: , 3

Solution:

$\mathrm{Mg}+\underset{\mathrm{O}_{2} / \mathrm{N}_{2}}{\operatorname{air} \stackrel{\Delta}{\longrightarrow}} \mathrm{MgO}+\mathrm{Mg}_{3} \mathrm{~N}_{2}$

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