Answer:
displacement reaction.
Step-by-step explanation:
When chlorine gas is passed through a solution of potassium iodide, as a result of this reaction the products i. e. solid iodine and potassium chloride are formed. This type of reaction is called a displacement reaction because in this reaction the less reactive iodine that is attached with potassium iodide is replaced by the more reactive chlorine molecule so the displacement of atoms held so we called it displacement reaction.