In the forward reaction NH4Cl ⇌ NH3 + HCl, which gases are produced?

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Study for the IGCSE Edexcel Chemistry Test. Access flashcards and multiple choice questions with hints and explanations. Get ready for your exam!

Multiple Choice

In the forward reaction NH4Cl ⇌ NH3 + HCl, which gases are produced?

Explanation:
Heating solid ammonium chloride causes it to decompose into two gaseous products. The forward process is NH4Cl(s) → NH3(g) + HCl(g), so the gases formed are ammonia and hydrogen chloride. This is a typical decomposition of a salt when heated, where the solid breaks apart into two volatile species. Oxygen and hydrogen would come from splitting water, which isn’t involved here. Nitrogen and hydrogen might appear if ammonia decomposed further at very high temperatures, but the question’s forward reaction shows the immediate products of ammonium chloride decomposition. Water isn’t produced in this pathway.

Heating solid ammonium chloride causes it to decompose into two gaseous products. The forward process is NH4Cl(s) → NH3(g) + HCl(g), so the gases formed are ammonia and hydrogen chloride. This is a typical decomposition of a salt when heated, where the solid breaks apart into two volatile species.

Oxygen and hydrogen would come from splitting water, which isn’t involved here. Nitrogen and hydrogen might appear if ammonia decomposed further at very high temperatures, but the question’s forward reaction shows the immediate products of ammonium chloride decomposition. Water isn’t produced in this pathway.

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