Answer: Option (D) is the correct answer.
Explanation:
When sodium chloride reacts with copper sulfate to produce sodium sulfate and copper chloride then sodium being more reactive displaces copper from copper sulfate and copper combines with chlorine.
Thus, reactions where two compounds react and cations and anions of both compounds interchange their respective places then this type of reaction is known as double displacement reaction.
For example, \(NaCl + CuSO_{4} \rightarrow NaSO_{4} + CuCl\) is a double displacement reaction.
