Answer 1

Hydrolysis by aqueous KOH proceeds through the formation of carbocation. If carbocation is stable, then the compound is easily hydrolyzed by aqueous KOH. Now,  `C_6H_5CH_2Cl` forms 1°-carbocation, while C6H5CHClC6H5 forms 2°-carbocation, which is more stable than 1°-carbocation. Hence,  `C_6H_5CHClC_6H_5` is hydrolyzed more easily than `C_6H_5CH_2Cl` by aqueous KOH.