Question

A Phenol $\left(C_6{H}_{5}OH\right)$ contains $-OH$ group(s) directly attached to $s{p}^2$ hybridized carbon atom(s) of an aromatic system.
The carbon- oxygen bond length in phenol is slightly less than that in methanol.
Phenol can be prepared by various means such as through alkali fusion of sulphonates, hydrolysis of diazonium salts etc. Commercially it is prepared from Dow's process.
The ionisation constant of phenol is higher than that of ethanol because:

• A. Phenoxide ion is bulkier than ethoxide
• B. Phenoxide ions is stronger base than ethoxide
• C. Phenoxide ions is stabilised through delocalisation
• D. Phenoxide ion is less stable than ethoxide

Answer 1

The correct option is C Phenoxide ions is stabilised through delocalisation

Phenoxide ion is more stabilised than ethoxide ion due to resonance. Therefore, the constant of phenol is higher than ethanol.