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Anhydrous ferric chloride is prepared by...

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 ferric oxide with hydrochloric acid

D

reaction of metallic iron with hydrochloric acid

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The correct Answer is:
B
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(a) Thionyl chloride can be synthesised by chlorinating SO_(2) using PCI_(5) . Thionyl chloride is used to prepare anhydrous ferric chloride startinh from its hexahydrated salt. Alternatively, from anhydrous ferric chloride can also be prepared from its hexahydrated salt by treating with 2,2-dimethoxypropane. Discuss all this using balanced chemical equations. (b) Reaction of phosphoric acid with Ca_(3)(PO_(4))_(2) yields a fertiliser "triple superphosphate" represent the same through balanced chemical equation.

Assertion : Reaction of thionyl chloride with hydrated ferric chloride yields anhydrous ferric chloride. Reason : Water of crystallisation present with ferric chloride reacts with thionyl chloride to liberate HCl and SO_(2) gases.

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