Anhydrous ferric chloride is prepared by (2002) (a) heating hydrated ferric chloride at a high te...

Anhydrous ferric chloride is prepared by
(2002)
(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 hydrochloric acid
(d) reaction of metallic iron with hydrochloric acid

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