Solution:
Concept- In precipitation reaction, two soluble salts form an insoluble salt in the form of precipitate. In a double displacement reaction, the cations and anions in reactants are displaced by each other and two new molecules are formed.Now, the reaction between potassium chloride and silver nitrate solution is as follows;
In this reaction, both potassium chloride and silver nitrate are exchanging their ions to form solid silver chloride and aqueous potassium nitrate. Thus, the reaction between potassium chloride and silver nitrate is a double displacement reaction.
Also, an insoluble AgCl is precipitated out. So it is also a precipitation reaction.
Thus, the given reaction is both a double displacement reaction and a precipitation reaction.
Hence, the correct option is (4).
