Question

(l) $LiNO _3 \xrightarrow{\Delta} X$ (Solid) $+$ gas $+ O _2$
(II) $NaNO _3 \xrightarrow[800^{\circ} C ]{\Delta} Y$ (Solid) $+$ gas $+ O _2$
The incorrect statement regarding above reactions is

• A. $X$ and $Y$ are respective metal oxides
• B. $NO_{2}$ is formed in $\left(II\right)$ reaction
• C. Both are redox reactions
• D. $NO_{2}$ is formed in $\left(I\right)$ reaction

Answer 1

Answer: (B)

Due to the small size of $Li^{+}$ , it is very polarizing and favours the formation of $LiO_{2}$ .
$4LiNO_3 \rightarrow \underset{X}{2Li_2O_{(s)} + 4NO_{2(g)} + O_{2(g)}}$ ​
While other alkali metal nitrates decomposes to give corresponding nitrite.
$NaNO_{3} \xrightarrow [800 ^\circ C]{\Delta } \underset{Y}{NaNO_{2}+\frac{1}{2}O_{2}}$