Out of C₆H₅CH₂Cl and C₆H₅CHClC₆H₅, which is more easily hydrolysed by aqueous KOH.

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.