Question

Ammonium chloride doesn’t undergo sublimation upon heating.
(A) True
(B) False

Answer 1

Hint: The transition of a substance directly from a solid-state to a gaseous state without passing through the liquid state is known as Sublimation. Recall the reaction in which ammonium chloride undergoes and determine the phase of products.

Complete step by step solution:
-Sublimation occurs at temperatures and pressures below a substance’s triple point in its phase diagram, which means it is an endothermic process.
-An inorganic compound with the chemical formula \[N{{H}_{4}}Cl\]. This compound is white crystalline salt and is highly soluble in water.
-The other names of Ammonium chloride are Sal ammoniac, Salmiac, Sal Armagnac, Salt ammoniac. The natural mineralogical form of ammonium chloride is known as Sal ammoniac.
-Ammonium chloride upon heating appears to be sublime but actually, it undergoes decomposition into ammonia and hydrogen chloride gas.
$N{{H}_{4}}Cl\to N{{H}_{3}}+HCl$
So, the statement in the question is true.

Hence the correct answer is option A.

Note: -Ammonium chloride has numerous applications. The dominant application of ammonium chloride is as a nitrogen source in fertilizers which uses approximately 90% of the produced ammonium chloride worldwide.
-Ammonium chloride is used as a flux by cleaning the surface of workpieces by reacting with the metal oxide at the surface to form a volatile metal chloride.
-Ammonium chloride also finds its use in the medical field as an expectorant in cough medicine.
-Ammonium chloride in its natural and mineralogical form is used as a food additive. It is also a food supplement for cattle and an ingredient in nutritive media for yeasts and many microorganisms.
-Ammonium chloride in the laboratory has been used in history to produce low temperatures in cooling baths. Nowadays, it is used as buffer solutions.