Question

The metal that forms nitride by reacting directly with $N_2$ of air, is :

• A. $K$
• B. $Cs$
• C. $Li$
• D. $Rb$

Answer 1

Answer: (C)

$Li$

Answer 2

Only Li react directly with $N_2$ out of alkali metals
${6 Li + N_2 -> 2 Li_3 N }$