Question

When ammonia gas reacts with hydrochloric acid gas, the ammonium chloride is formed which is in

• A. Liquid state
• B. Solid-state
• C. Gaseous state
• D. partly solid and partly gaseous

Answer 1

The correct option is B

Solid-state

The explanation for the correct option:

Option (B)

• The reaction of Ammonia(${\mathrm{NH}}_3$) with Hydrochloric acid ($\mathrm{HCl}$) results in the formation of Ammonium chloride(${\mathrm{NH}}_4\mathrm{Cl}$) in solid-state.
• $\underset{\mathrm{Ammonia}}{{\mathrm{NH}}_3\left(\mathrm{g}\right)}+\underset{\mathrm{Hydrochloric}\mathrm{acid}}{\mathrm{HCl}\left(\mathrm{g}\right)}\to \underset{\mathrm{Ammonium}\mathrm{chloride}}{{\mathrm{NH}}_4\mathrm{Cl}\left(\mathrm{s}\right)}$
• It is a type of exothermic reaction.
• Exothermic reaction: The chemical reaction which proceeds on its own with the evolution of heat or light.
• They are also called spontaneous reactions.
• Spontaneous reactions are ones that happen on their own and do not require any type of external energy in order to take place.
• Ammonium chloride forms in the reaction in the form of solid

Therefore the correct option is an option (B).