Hydrolysis by KOH results in the formation of the carbocation. Those compounds which leads to the formation of stable carbocation are easily hydrolysed.C₆H₅CH₂Cl leads to formation of 1°-carbocation, while C₆H₅CHClC₆H₅ forms 2°-carbocation, which is more stable than 1°-carbocation. Hence C₆H₅CHClC₆H₅, is hydrolyzed more easily than C₆H₅CH₂Cl by aqueous KOH.