Phenol is less acidic than:
| 1. | Ethanol | 2. | o-Nitrophenol |
| 3. | o-Methylphenol | 4. | o-Methoxyphenol |
Hint: If electron withdrawing group attached to phenol then acidity of phenol increases.
In o-nitrophenol, nitro group is present at ortho position. Presence of electron withdrawing group at ortho position increases the acidic strength. On the other hand, in o-methylphenol and in o-methoxyphenol, electron releasing group() are present.
Presence of these groups at ortho or para positions of phenol decreases the acidic strength of phenols. So, phenol is less acidic than o-nitrophenol.
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