Question

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

Answer 1

Hint: The laughing gas is an oxide of nitrogen in which the nitrogen is in +1 oxidation state.
The laughing gas is also called nitrous oxide.

Complete step by step answer:
The question is basically about the preparation of the laughing gas .We know that the laughing gas is an oxide of nitrogen in which the nitrogen is in +1 oxidation state.
Laughing gas is also called as the nitrous oxide (${{N}_{2}}O$)
So let us move on to the preparation of the laughing gas i.e. nitrous oxide.
We can say that, there are actually two steps in this preparation. Two steps are involved in the formation of the final product.
Preparation:
First we heat the mixture of ammonium chloride and sodium nitrate which yield ammonium nitrate and sodium chloride.
The reaction can be written as,
$N{{H}_{4}}Cl+NaN{{O}_{3}}\xrightarrow{\Delta }N{{H}_{4}}N{{O}_{3}}+NaCl$
This reaction could be said as a type of double displacement reaction.
And the obtained ammonium nitrate is again heated and it decomposes into nitrous oxide and water molecules.
$N{{H}_{4}}N{{O}_{3}}\xrightarrow{\Delta }{{N}_{2}}O+2{{H}_{2}}O$

So the correct answer from the options given for this question is option (D).

Additional information:
The nitrous acid is also called as happy gas. The nitrous acid is called the laughing gas as when we inhale this gas, the air in our lungs is replaced by the gas which prevents the oxygen flow to the brain and blood and this deprivation causes giggles because of which we laugh. Some of the common side’s effects if we inhale ${{N}_{2}}O$ is hallucination or mental confusion, leg pains etc. And it takes few minutes to stop our laugh if we have inhaled ${{N}_{2}}O$ gas

Note: ${{N}_{2}}O$ is a good anesthetic and analgesic, hence they are used in dentistry. It is a good oxidizer and possesses less toxicity and more stability than other oxidizers. Hence it is preferred as rocket oxidizer