When a sample of ammonium chloride is heated, it breaks down to form ammonia and hydrogen chloride gas. $\text{NH}_4\text{Cl}(s) \rightarrow \text{NH}_3(g) + \text{HCl}(g)$ (reaction 1) If the hot ammonia and hydrogen chloride gases come into contact with a cold surface, white ammonium chloride solid is produced again. Which statements are correct?
- A1, 2 and 3
- B1 and 2 only
- C2 and 3 only
- D1 only