A) \[M{{g}_{3}}{{N}_{2}}\]
B) \[Mg{{(N{{O}_{3}})}_{2}}\]
C) \[MgC{{O}_{3}}\]
D) \[Mg{{(N{{O}_{3}})}_{3}}\]
Correct Answer: A
Solution :
\[Mg\] from\[MgO\] on heating in air but it reacts with\[{{N}_{2}}\]to form\[M{{g}_{3}}{{N}_{2}},\text{ }{{N}_{2}}\]is available in atmosphere in excess.
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