Question

On heating $NaN{O}_3$, it gives:

• A. $NaN{O}_2+O_2$
• B. $N_2$
• C. $N{O}_2$
• D. $O_2+N{O}_2$

Answer 1

The correct option is A $NaN{O}_2+O_2$

All alkali nitrates except lithium on heating decompose to give respective metal nitrite and oxygen.
$2NaN{O}_3\stackrel{{500}^{\circ }C}{\rightleftharpoons }2NaN{O}_2+O_2$

Lithium is an exception due to its small size and polarisation property. Lithium nitrate when heated gives lithium oxide, $L{i}_{2}O$