Question

Laughing gas is prepared by heading.
(A) $\text{N}{{\text{H}}_{4}}\text{ Cl}$
(B) ${{\left( \text{N}{{\text{H}}_{4}} \right)}_{2}}\text{ S}{{\text{O}}_{4}}$
(C) $\text{N}{{\text{H}}_{4}}\text{ Cl}+\text{NaN}{{\text{O}}_{3}}$
(D) $\text{N}{{\text{H}}_{4}}\text{ N}{{\text{O}}_{3}}$

Answer 1

Laughing gas is an oxide of Nitrogen as a molecular formula ${{\text{N}}_{2}}\text{O}$ or named as Nitrogen Oxide or-nitrogen Oxide. Rather than nitrogen having total ${{\text{O}}^{-}}$ No. oxide because of verifying oxidation state from $+1$ to $+5$ as ${{\text{N}}_{2}}\text{O}$ , NO, $\text{N}{{\text{O}}_{2}}$ , ${{\text{N}}_{2}}{{\text{O}}_{5}}$ and ${{\text{N}}_{2}}{{\text{O}}_{3}}$

Complete step by step solution:
Nitrogen dioxide $\left( {{\text{N}}_{2}}\text{O} \right)$ is prepared by gentle heating of ammonium nitrate or heating a mixture of ammonium sulphide and nitrate below 513 K
$\text{N}{{\text{H}}_{4}}\text{ N}{{\text{O}}_{3}} \xrightarrow {\text{Heat}}\text{ }{{\text{N}}_{2}}\text{O}+2{{\text{H}}_{2}}\text{O}$
Di-nitrogen oxide
${{\left( \text{N}{{\text{H}}_{4}} \right)}_{2}}\text{ S}{{\text{O}}_{4}}+2\text{ NaN}{{\text{O}}_{3}}\to \text{ 2 N}{{\text{H}}_{4}}\text{ N}{{\text{O}}_{3}}+\text{N}{{\text{a}}_{2}}\text{ S}{{\text{O}}_{4}} \\\ \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \downarrow \\\ \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \text{2 N}{{\text{O}}_{2}}+\text{4}{{\text{H}}_{2}}\text{ O} \\\$
Laughing gas

**Option ‘D’ is correct i.e.
It is prepared by $\text{N}{{\text{H}}_{4}}\text{ N}{{\text{O}}_{3}}$ ** .

Additional Information:
${{\text{N}}_{2}}\text{O}$ is a colorless gas with pleasant order. When ${{\text{N}}_{2}}\text{O}$ is inclined in moderate quantity it produces laughter hence named as laughing gas.

Note:
Properties of ${{\text{N}}_{2}}\text{O}$
-It is heavier than air and soluble in water.
-It is neutral oxide of Nitrogen.
-It does not burn but supports combustion.
-If the mixture of ${{\text{H}}_{2\text{ }}}$ and ${{\text{N}}_{2\text{ }}}\text{O}$ taken in equal amount then it explodes with violence
${{\text{N}}_{2}}\text{O}+{{\text{H}}_{2}}\to {{\text{N}}_{2\text{ }}}+{{\text{H}}_{2}}\text{O}$
Uses:
-It is used as a propellant gas. A mixture of ${{\text{N}}_{2\text{ }}}\text{O}$ and ${{\text{O}}_{2}}$ is used as an anesthetic in dental and other minor surgical operations.