Question
Anhydrous ferric chloride is prepared by
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 metallic iron with hydrochloric acid
D.
reaction of metallic iron with nitric acid
Answer :
heating metallic iron in a stream of dry chlorine gas
Solution :
$$2Fe + 3C{l_2}\,\left( {{\text{dry}}} \right) \to 2FeC{l_3}\left( {{\text{anhydrous}}} \right)$$