JEE PYQ: S Block Elements Question 25
Question 25 - 2019 (09 Apr Shift 1)
Magnesium powder burns in air to give:
(a) $\text{Mg(NO}_3)_2$ and $\text{Mg}_3\text{N}_2$ (b) MgO and $\text{Mg}_3\text{N}_2$ (c) MgO only (d) MgO and $\text{Mg(NO}_3)_2$
Show Answer
Answer: (b)
Solution
Mg burns in air and produces a mixture of nitride and oxide: $2\text{Mg} + \text{O}_2 \rightarrow 2\text{MgO}$ and $3\text{Mg} + \text{N}_2 \rightarrow \text{Mg}_3\text{N}_2$.