2-chloroethanol is more acidic than ethanol. Due to —I-effect (electron withdrawing group) of the Cl-atom, electron density in O—H bond decreases. So, O—H bond of 2-chloroethanol becomes weaker than O—H bond of ethanol and thus, the release of H ion from O — H bond of 2-chloroethane becomes easier. Thus, 2-chloroethanol is more acidic than ethanol.