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 HCl(aq)
D. reaction of metallic iron with HCl(aq)

Answer

B

Explanation

`(B) 2Fe+3Cl_(2)rarr2FeCl_(3)("anhydrous"),(A),(C ),(D)` do not give anhydrous `FeCl_(3)` but hydrated `FeCl_(3)`