NEET 2010 Chemistry question
Among the following four compounds : (i) Phenol (ii) Methyl phenol (iii) Meta-nitrophenol (iv) Para-nitrophenol The acidity order is :
Answer: (1)
Solution
Acidity of phenols depends on the stability of the phenoxide ion. Electron-withdrawing groups stabilise the phenoxide and increase acidity; electron-releasing groups (such as ) destabilise it and decrease acidity. The group at the para position stabilises the phenoxide by both
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