How can you prepare Cl2 from HCl and HCl from Cl2? Write reactions only.
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Solution
(1) HCl is oxidized to chlorine (in Deacon's process) by atmospheric oxygen in presence of cupric chloride catalyst at 723 K. 4HCl+O2CuCl2−−−−→2Cl2+2H2O (2) Hydrogen combines with chlorine to form HCl.