Which of the following alkali metals when burnt in air forms a mixture of oxide as well as nitride?

Which of the following alkali metals when burnt in air forms a mixture

1.	Which of the following alkali metals when burnt in air forms a mixture of oxide as well as nitride?
Answer» K Na Li Cs Solution :Lithium when BURNT in air forms a MIXTURE of oxide as well as nitride. `4Li+O_(2) OVERSET(Delta)to 2Li_(2)O,6Li+N_(2) overset(Delta)to 2Li_(3)N`