How can you prepare `Cl_2` from HCl and HCl from `Cl_2` ? Write reactions only.

Explanation

(i) Preparation of `Cl_(2)` from HCl:
`4HCl("conc") + MnO_(2)(s) to MnCl_(2)(aq) + Cl_(2)(g) + 2H_(2)O (l)`
Deacon.s Process:
`4HCl_(g) + O_(2)(g) overset(CuCl_(2))to 2H_(2)O + 2Cl_(2)(g)`
By action of `KMnO_(4)` on HCl,
`2KMnO_(4) + 16 HCl to 2KCl(aq) + 2MnCl_(2) + 5Cl_(2) + 8H_(2)O`
(ii) Preparation of HCl from `Cl_(2)`:
`H_(2)(g) + Cl_(2)(g) overset(hv) to 2HCl(g)`