Anhydrous ferric 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 gas.
C. Reaction of ferric oxide with HCI (aq).
D. Reaction of metallic iron with HCI (aq).

Answer

B

Explanation

`2Fe+3Cl_2 to 2FeCl_3`(anhydrous) , (A), ( C) and (D) do not give anhydrous `FeCl_3` but hydrated `FeCl_3`.