Question
How can you prepare $Cl_2$ from $HCl$ and $HCl$ from $Cl_2?$ Write reactions only.
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Answer
$\text{MnO}_2+4\text{HCl}\rightarrow\text{MnCl}_2+\text{Cl}_2+2\text{H}_2\text{O}\\\text{Oxidising}\\\text{agent}$We can also used $KMnO_4, K_2Cr_2O_7,$ etc., in place of $MnO_2.$
$\text{H}_2+\text{Cl}_2\xrightarrow[]{\text{Diffiused sunlight}}2\text{HCl}$
$\text{H}_2+\text{Cl}_2\xrightarrow[]{\text{Diffiused sunlight}}2\text{HCl}$
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