Question

Choose the correct words or phrases from the brackets to complete the following sentences:

When ammonium chloride is heated, it undergoes thermal _____. (decomposition/dissociation)

Answer 1

• When ammonium chloride is heated it undergoes dissociation to form a product such as ${\mathrm{NH}}_3$​ and $\mathrm{HCl}$.
• The ammonium chloride $\left({\mathrm{NH}}_4\mathrm{Cl}\right)$ undergoes sublimation when it is heated, the substance changes from solid to gas. The gas contains molecules such as ammonia and hydrogen chloride.
• Thus, When ammonium chloride is heated, it undergoes thermal dissociation.