Question

• A. Ammonium nitrate
• B. Ammonium nitrite
• C. Magnesium nitride
• D. Ammonium Chloride

Answer 1

Answer: (B), (C)

Magnesium nitride

Option (a):

• ${\mathrm{NH}}_4{\mathrm{NO}}_3$ is the chemical formula for ammonium nitrate.
• When heated, ammonium nitrate decomposes, releasing nitrous oxide and water. When ammonium nitrate is heated, the following happens:
  ${\mathrm{NH}}_4{\mathrm{NO}}_3\stackrel{\mathrm{Heat}}{\to }{\mathrm{N}}_2\mathrm{O}+2{\mathrm{H}}_2\mathrm{O}$
• Heating ammonium nitrate does not produce nitrogen gas.
• As a result, option (a) is incorrect.

Option (b):

• ${\mathrm{NH}}_4{\mathrm{NO}}_2$ is the chemical formula for ammonium nitrite.
• When heated, ammonium nitrite decomposes, releasing nitrogen gas and water. When ammonium nitrite is heated, the following happens:
  ${\mathrm{NH}}_4{\mathrm{NO}}_2\stackrel{\mathrm{Heat}}{\to }{\mathrm{N}}_2+{\mathrm{H}}_2\mathrm{O}$
• Ammonium nitrite can be heated to produce nitrogen gas.
• As a result, option (b) is the correct answer.

Option (c):

• ${\mathrm{Mg}}_3{\mathrm{N}}_2$ is the chemical formula for magnesium nitride.
• Magnesium nitride decomposes when heated, releasing magnesium and nitrogen gas. When magnesium nitride is heated, the following happens:
  ${\mathrm{Mg}}_3{\mathrm{N}}_2\stackrel{\mathrm{Heat}}{\to }3{\mathrm{N}}_2+6\mathrm{Mg}$
• Magnesium nitride can be heated to produce nitrogen gas.
• As a result, option (c) is also the correct answer.

Option (d):

• Ammonium chloride has the chemical formula ${\mathrm{NH}}_4\mathrm{Cl}$.
• Ammonium chloride decomposes when heated, producing ammonia and hydrochloric acid. When ammonium chloride is heated, the following happens:
  ${\mathrm{NH}}_4\mathrm{Cl}\stackrel{\mathrm{Heat}}{\to }{\mathrm{NH}}_3+\mathrm{HCl}$
• Ammonium chloride cannot be heated to produce nitrogen gas.
• As a result, option (d) is incorrect.

By heating ammonium nitrite and magnesium nitride, nitrogen gas can be generated. Therefore, option (b) and option (c) ammonium nitrite and magnesium nitride are the correct choices.