Question

A salt prepared by displacement reaction is ______.

Options

• ferric chloride

• ferrous chloride

• silver chloride

Answer 1

A salt prepared by displacement reaction is ferrous chloride.

Explanation:

Ferrous chloride (FeCl₂) is prepared through a single displacement reaction by reacting iron metal directly with dilute hydrochloric acid (\[\ce{Fe + 2HCl -> FeCl2 + H2\uparrow}\]). In contrast, ferric chloride (FeCl₃) is prepared by direct combination (synthesising dry chlorine gas with heated iron), and silver chloride (AgCl) is an insoluble salt prepared via a double decomposition (precipitation) reaction.