question_answer

                The ionization constant of phenol is higher than that of ethanol because:                            

A)                 phenoxide ion is bulkier than ethoxide 

B)                 phenoxide ion is stronger base than ethoxide

C)                 phenoxide   ion   is   stabilized   through derealization

D)                 phenoxide ion is less stable than ethoxide

Correct Answer: C

Solution :

                Resonance stabilization of phenoxide-ion.                                 Phenoxide ion is more stable than ethoxies ion due to resonance. Therefore, the ionisation constant of phenoi is higher than ethanol.