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Anhydrous ferric chloride is prepared by...

Anhydrous ferric chloride is prepared by

A

Dissolving `Fe(OH)_3` in condentrated HCl

B

Dissolving `Fe(OH)_3` in dilute HCl

C

Passing dry HCl over heated iron scrap.

D

Passing dry ` Cl_2` gas over heated iron scrap.

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