Anhydrous feric chloride is prepared by:

Options

A. Heating hydrated ferric chloride at a high temperature in a stream of air
B. heating metallic iron in a stream of dry chlorine.
C. Reaction of ferric oxide with HCl
D. reaction of metallic iron with hydrochloric acid

Answer

B

Explanation

With (A),(C) and (D) reactions only hydrated ferric chloride is obtained (as reaction take place in aqueous medium ) but with metallic iron on heating in a stream of `Cl_(2)` the anhydrous `FeCl_(3)` is obtained `2Fe+3Cl_(3) to 2FeCl_(3)` (anhydrous).