Chlorine gas is soluble in water due to its ability to undergo a disproportionation reaction, where it reacts with water to form hydrochloric acid (HCl) and hypochlorous acid (HClO). This reaction involves chlorine being both oxidized and reduced, allowing it to dissolve in water rather than simply undergoing hydration. The resulting chlorine ions from HCl contribute to its solubility.Despite chlorine gas being nonpolar, its reactivity increases significantly in the presence of water, as it forms ionic compounds like HCl. This reaction facilitates chlorine's interaction with other ionic compounds and organic substances, enhancing its overall reactivity.