Question

On heating a mixture of \[{\text{N}}{{\text{H}}_4}{\text{Cl and KN}}{{\text{O}}_{\text{2}}}\] we get:
A.\[{\text{N}}{{\text{H}}_4}{\text{N}}{{\text{O}}_{\text{3}}}\]
B.\[{\text{KN}}{{\text{H}}_4}{{\text{(N}}{{\text{O}}_{\text{3}}})_2}\]
C.${{\text{N}}_{\text{2}}}$
D.${\text{NO}}$

Answer 1

Hint: Chemical reaction is a method or we can say process to convert substances into different products. The substances which are converted are known as reactants and the resultant substances obtained after reaction are known as products and this whole process is known as chemical reaction.

Complete step by step answer:
The heating of mixture of \[{\text{N}}{{\text{H}}_4}{\text{Cl and KN}}{{\text{O}}_{\text{2}}}\] is an example of chemical reaction. \[{\text{N}}{{\text{H}}_4}{\text{Cl and KN}}{{\text{O}}_{\text{2}}}\]are reactants which are mixed together in presence of heat.
\[{\text{N}}{{\text{H}}_4}{\text{Cl }}\] is known as ammonium chloride and \[{\text{KN}}{{\text{O}}_{\text{2}}}\] is known as potassium nitrite.
The reaction in which heating a mixture of \[{\text{N}}{{\text{H}}_4}{\text{Cl and KN}}{{\text{O}}_{\text{2}}}\] is done is as following:
\[{\text{N}}{{\text{H}}_4}{\text{Cl + KN}}{{\text{O}}_{\text{2}}} \to {{\text{N}}_{\text{2}}}{\text{ + KCl + }}{{\text{H}}_{\text{2}}}{\text{O}}\]
The products obtained in this reaction are nitrogen gas, potassium chloride and two moles of water.
In \[{\text{N}}{{\text{H}}_4}{\text{Cl }}\] the oxidation state of nitrogen is $ - 3$ and in molecule \[{\text{KN}}{{\text{O}}_{\text{2}}}\] the oxidation state of nitrogen is $ + 3$ and the oxidation state of nitrogen of ${{\text{N}}_{\text{2}}}$ is $0$ .
So we can say that \[{\text{N}}{{\text{H}}_4}{\text{Cl }}\] acts as a reducing agent while \[{\text{KN}}{{\text{O}}_{\text{2}}}\] acts as an oxidising agent. Hence the overall produced gas nitrogen has nitrogen atoms with the oxidation states as zero.
The ammonium chloride and potassium nitrite together forms a saturated solution which reacts with each other when the solution is boiled.
This reaction (heating a mixture of \[{\text{N}}{{\text{H}}_4}{\text{Cl and KN}}{{\text{O}}_{\text{2}}}\] ) is used to produce a super stable nitrogen gas which is used for industrial purposes such as packaging.

Note:
${\text{N}}{{\text{H}}_{\text{4}}}{\text{Cl}}$ is an explosive substance. It reacts violently with the oxidizing agents and produces corrosive gaseous vapours of ammonia and some nitrous vapours also. Ammonium chloride is a dangerous chemical substance which creates human health problems such as cough, headache etc. if exposed openly.