Question

Phenol is less acidic than ______.

विकल्प

• ethanol

• o-nitrophenol

• o-methylphenol

• o-methoxyphenol

Answer 1

Phenol is less acidic than o-nitrophenol.

Explanation:

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 and in o-methoxyphenol, electron releasing group \[\ce{(-CH3-OCH3)}\]

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.