State true or false.
The thermal decomposition reaction of $\mathrm{Ba}{\left({\mathrm{N}}_3\right)}_2$ is as follows-
$\mathrm{Ba}{\left({\mathrm{N}}_3\right)}_2\to \mathrm{Ba}+3{\mathrm{N}}_2$

A substance decomposing in the presence of heat is said to be thermally decomposing. Metals from alkaline earth create azide.$\mathrm{M}{\left({\mathrm{N}}_3\right)}_2$ This is the general formula for this. Thermal breakdown of alkaline earth azide yields metal and nitrogen gas.

Thermal decomposition is the reaction of material breaking down due to heat. A decomposition temperature is a temperature at which a substance began to chemically break down. The heat is absorbed in this endothermic reaction, which breaks the compound's chemical bonds.
Barium azide is a substance that is not organic. Its formulation is $\mathrm{Ba}{\left({\mathrm{N}}_3\right)}_2$. It has an explosive quality. One barium metal atom forms an ionic interaction with the negatively charged nitrogen atom of the triazide group $(\stackrel{-}{\mathrm{N}} = \stackrel{+}{\mathrm{N}} = \stackrel{-}{\mathrm{N}})$ in the barium azide structure.
Barium azide is a metal nitride with the structure-

$\mathrm{Ba}{\left({\mathrm{N}}_3\right)}_2\to \mathrm{Ba}+3{\mathrm{N}}_2$
On heating, it decomposes into metal and nitrogen gas. Therefore given reaction is true.

Hence, the correct answer is option A.