Is it correct to consider dissolving HCl gas in water as oxidation –reduction process?
Given the dissolution of $\ce{HCl}$ gas in water:  

$$\ce{HCl(g) + H2O(l) &lt;--&gt;H3O+(aq) +Cl-(aq)}$$  

The oxidation state of all hydrogen atoms is +1 and that of all chlorine atoms is -1. Thus, nothing has been oxidized or reduced, and no redox reaction has taken place.