Chemistry - Complete s-block Question with Solution | TestHub

Lithium nitrate ($LiN{O}_3$) decomposes on heating to form lithium oxide ($L{i}_{2}O$), nitrogen dioxide ($N{O}_2$), and oxygen ($O_2$). Nitrogen dioxide ($N{O}_2$) is a brown gas. Other alkali metal nitrates ($NaN{O}_3$, $KN{O}_3$) decompose to form the corresponding nitrite and oxygen, without producing $N{O}_2$.

The decomposition reaction for $LiN{O}_3$ is:

$$4LiN{O}_3(s)\stackrel{\Delta }{\to }2L{i}_{2}O(s)+4N{O}_2(g)+O_2(g)$$

The brown gas released is $N{O}_2$.