Question

The thermal decomposition of barium azide produces the same gas as produced in the thermal decomposition:
(A) $N{{H}_{4}}C{{r}_{2}}{{O}_{7}}$
(B) $N{{H}_{4}}Cl$
(C) $Pb{{\left( N{{O}_{3}} \right)}_{2}}$
(D) $N{{H}_{4}}N{{O}_{3}}$

Answer 1

Hint : We know that the heating of ammonium dichromate, and barium azide individually represents the decomposition reaction. Write down the chemical reactions for both the compounds. One product formed has very high dissociation energy and has a maximum percentage in earth’s atmosphere and the other one is the oxide of the previous non-metal.

Complete Step By Step Answer:
The reaction of decomposition of substances caused by the heat is called thermal decomposition. The temperature at which the substance decomposed chemically is a decomposition temperature. This is an endothermic reaction and the heat is absorbed to break the chemical bonds of the compound. Alkaline earth azide readily decomposes to give the alkaline earth metal and nitrogen on heating. Barium is an alkaline earth metal, It forms an azide.
The heating of barium azide is considered to be a source for obtaining the pure nitrogen, and it is explosive in nature. But if we talk about the ammonium dichromate, its reaction is based on ammonium dichromate volcano, it means on heating it looks like a miniature volcano.
Barium azide is used to prepare magnesium, sodium, lithium, rubidium, and zinc azides. On heating, at high temperature the barium azide undergoes thermal decomposition. The thermal decomposition of barium azide produces elemental barium with nitrogen gas.
Therefore, the correct answer is option D.

Note :
Remember that as mentioned chromium shows $+3$ oxidation state in chromium oxide $\left( C{{r}_{2}}{{O}_{3}} \right),$ here it will be $2x-6\text{ }=\text{ }0$ ; it means $-6$ represents the charge of $3$ oxygen atoms, i.e. $-2$ each, and for chromium consider the charge to be $x$ , and it is neutral molecule, so it is equal to zero. Thus, we can calculate the oxidation state of chromium. The value of x attained i.e. $3$ is the corresponding oxidation state.