JEE PYQ: S Block Elements Question 31
Question 31 - 2019 (09 Jan Shift 2)
The metal that forms nitride by reacting directly with $\text{N}_2$ of air, is:
(a) K (b) Li (c) Rb (d) Cs
Show Answer
Answer: (b)
Solution
Amongst the given alkali metals, only lithium can react with $\text{N}_2$ in air to form lithium nitride: $6\text{Li} + \text{N}_2 \rightarrow 2\text{Li}_3\text{N}$.