The metal that forms nitride by reacting directly with of air is :
Rb
Cs
K
Li
Nature of Nitrates of alkali metals -
Decomposed upon heating to nitrites and evolve
- wherein
Nitride of Li and Mg -
Both for nitride by direct combination with nitrogen
- wherein
Other alkali metals combine at high temperature
Only Li react with N2 from all alkali metals
Rb
Option 2)Cs
Option 3)K
Option 4)Li
Study 40% syllabus and score up to 100% marks in JEE