Question

Consider the following reactions:

$Mg+N_2\to A\left(s\right)$
$A+6H_{2}O\to Mg(OH{)}_2+B(g)$
In the above reactions, $A$ and $B$ are respectively:

• A. $M{g}_3{N}_2,N{O}_2$
• B. $MgO,NO$
• C. $MgO,N{H}_3$
• D. $M{g}_3{N}_2,N{H}_3$

Answer 1

The correct option is D $M{g}_3{N}_2,N{H}_3$

The reactions are as follows:
$3Mg+N_2\to M{g}_3{N}_2$
$M{g}_3{N}_2+6H_{2}O\to 3Mg(OH{)}_2+2N{H}_3$

Hence, $A$ and $B$ are $M{g}_3{N}_2$ and $N{H}_3$ respectively.