Question

(l) $LiN{O}_3\stackrel{\Delta }{\to }X$ (Solid) $+$ gas $+O_2$
(II) $NaN{O}_3\underset{800^{\circ }C}{\overset{\Delta }{\to }}Y$ (Solid) $+$ gas $+O_2$
The incorrect statement regarding above reactions is

• A. $X$ and $Y$ are respective metal oxides
• B. $N{O}_2$ is formed in $\left(II\right)$ reaction
• C. Both are redox reactions
• D. $N{O}_2$ is formed in $\left(I\right)$ reaction

Answer 1

Answer: (B)

Due to the small size of $L{i}^{+}$ , it is very polarizing and favours the formation of $Li{O}_2$ .
$4LiN{O}_3\to \underset{X}{2L{i}_2{O}_{(s)}+4N{O}_{2(g)}+O_{2(g)}}$ ​
While other alkali metal nitrates decomposes to give corresponding nitrite.
$NaN{O}_3\underset{800^{\circ }C}{\overset{\Delta }{\to }}\underset{Y}{NaN{O}_2+\frac{1}{2}{O}_2}$